diff --git a/cppcheck.supp b/cppcheck.supp
index afc934164..54e4dec21 100644
--- a/cppcheck.supp
+++ b/cppcheck.supp
@@ -14,8 +14,35 @@ useStlAlgorithm
 // Internal errors
 cppcheckError
 
-// Ignore style issues in g2clib
+// g2clib
 variableScope:src/plugins/weatherdata/gfs/g2clib/*.c
+knownConditionTrueFalse:src/plugins/weatherdata/gfs/g2clib/*.c
+redundantAssignment:src/plugins/weatherdata/gfs/g2clib/*.c
+unreadVariable:src/plugins/weatherdata/gfs/g2clib/*.c
+invalidFunctionArg:src/plugins/weatherdata/gfs/g2clib/*.c
 
 // Ignore unusedFunction as it has too many false positives (especially in tests)
 unusedFunction
+
+// Conflicts with CppCoreGuidelines ES.20 Always initialize an object
+redundantInitialization
+
+// Perf samples
+redundantAssignment:samples/blackmisc/samplesperformance.*
+unreadVariable:samples/blackmisc/samplesperformance.*
+
+// Benign
+duplicateCondition:src/xswiftbus/libxplanemp/src/XPMPPlaneRenderer.cpp
+
+// Unused file
+unknownMacro:src/xswiftbus/libxplanemp/src/BitmapUtils.cpp
+
+// False positives
+returnDanglingLifetime:src/blackmisc/iterator.h
+unreadVariable:tests/blackcore/testreaders/testreaders.cpp
+unknownMacro:src/blackmisc/aviation/altitude.h
+unknownMacro:src/blackmisc/geo/elevationplane.h
+ctuArrayIndex:src/xswiftbus/libxplanemp/src/XPMPPlaneRenderer.cpp
+
+// False positive memory leaks due to Qt parent/child relationship
+unsafeClassCanLeak
diff --git a/samples/blackmisc/samplesperformance.cpp b/samples/blackmisc/samplesperformance.cpp
index 9e70c68ca..037f6a585 100644
--- a/samples/blackmisc/samplesperformance.cpp
+++ b/samples/blackmisc/samplesperformance.cpp
@@ -797,17 +797,6 @@ namespace BlackSample
         return set;
     }
 
-    const CAircraftSituationList CSamplesPerformance::situations(const CCallsignSet &callsigns)
-    {
-        CAircraftSituationList situations;
-        for (const CCallsign &cs : callsigns)
-        {
-            const CAircraftSituation s(cs);
-            situations.push_back(s);
-        }
-        return situations;
-    }
-
     const QMap<CCallsign, CAircraftSituation> CSamplesPerformance::situationsMap(const CCallsignSet &callsigns)
     {
         QMap<CCallsign, CAircraftSituation> situations;
diff --git a/samples/blackmisc/samplesperformance.h b/samples/blackmisc/samplesperformance.h
index f68f429cd..533bbc7b5 100644
--- a/samples/blackmisc/samplesperformance.h
+++ b/samples/blackmisc/samplesperformance.h
@@ -94,9 +94,6 @@ namespace BlackSample
         //! Get n callsigns
         static BlackMisc::Aviation::CCallsignSet callsigns(int number);
 
-        //! Situations
-        static const BlackMisc::Aviation::CAircraftSituationList situations(const BlackMisc::Aviation::CCallsignSet &callsigns);
-
         //! Situations map
         static const QMap<BlackMisc::Aviation::CCallsign, BlackMisc::Aviation::CAircraftSituation> situationsMap(const BlackMisc::Aviation::CCallsignSet &callsigns);
 
diff --git a/samples/blackmiscsim/samplesfsuipc.cpp b/samples/blackmiscsim/samplesfsuipc.cpp
index 3d827b000..18d9fe4da 100644
--- a/samples/blackmiscsim/samplesfsuipc.cpp
+++ b/samples/blackmiscsim/samplesfsuipc.cpp
@@ -52,9 +52,8 @@ namespace BlackSample
     }
 
 #else
-    void CSamplesFsuipc::samplesFsuipc(QTextStream &streamOut)
+    void CSamplesFsuipc::samplesFsuipc(QTextStream &)
     {
-        Q_UNUSED(streamOut);
     }
 #endif
 
diff --git a/samples/blackmiscsim/samplesvpilotrules.cpp b/samples/blackmiscsim/samplesvpilotrules.cpp
index 657839467..17bda1791 100644
--- a/samples/blackmiscsim/samplesvpilotrules.cpp
+++ b/samples/blackmiscsim/samplesvpilotrules.cpp
@@ -30,7 +30,7 @@ namespace BlackSample
     /*
      * Samples
      */
-    void CSamplesVPilotRules::samples(QTextStream &streamOut, QTextStream &streamIn)
+    void CSamplesVPilotRules::samples(QTextStream &streamOut, const QTextStream &streamIn)
     {
         BlackMisc::registerMetadata();
         QScopedPointer<CVPilotRulesReader> vPilotReader(new CVPilotRulesReader());
diff --git a/samples/blackmiscsim/samplesvpilotrules.h b/samples/blackmiscsim/samplesvpilotrules.h
index 29ce3e843..bf83ea1d5 100644
--- a/samples/blackmiscsim/samplesvpilotrules.h
+++ b/samples/blackmiscsim/samplesvpilotrules.h
@@ -21,7 +21,7 @@ namespace BlackSample
     {
     public:
         //! Run the samples
-        static void samples(QTextStream &streamOut, QTextStream &streamIn);
+        static void samples(QTextStream &streamOut, const QTextStream &streamIn);
     };
 } // namespace
 
diff --git a/src/blackcore/afv/clients/afvclient.cpp b/src/blackcore/afv/clients/afvclient.cpp
index f952e13cc..3c9822846 100644
--- a/src/blackcore/afv/clients/afvclient.cpp
+++ b/src/blackcore/afv/clients/afvclient.cpp
@@ -204,7 +204,7 @@ namespace BlackCore
                                 // restart timer, normally it should be started already, paranoia
                                 // as I run in "my thread" starting timer should be OK
                                 {
-                                    QMutexLocker lock(&m_mutex);
+                                    QMutexLocker lock2(&m_mutex);
                                     if (m_voiceServerTimer) { m_voiceServerTimer->start(PositionUpdatesMs); }
                                 }
                                 m_retryConnectAttempt = 0;
@@ -498,21 +498,21 @@ namespace BlackCore
                 quint32 roundedFrequencyHz = static_cast<quint32>(qRound(frequencyHz / 1000.0)) * 1000;
                 roundedFrequencyHz = this->getAliasFrequencyHz(roundedFrequencyHz);
 
-                bool updateTransceivers = false;
+                bool update = false;
                 {
                     QMutexLocker lockTransceivers(&m_mutexTransceivers);
                     if (m_transceivers.size() >= id + 1)
                     {
                         if (m_transceivers[id].frequencyHz != roundedFrequencyHz)
                         {
-                            updateTransceivers = true;
+                            update = true;
                             m_transceivers[id].frequencyHz = roundedFrequencyHz;
                         }
                     }
                 }
 
                 // outside lock to avoid deadlock
-                if (updateTransceivers)
+                if (update)
                 {
                     this->updateTransceivers(false); // no frequency update
                 }
diff --git a/src/blackcore/afv/connection/apiserverconnection.cpp b/src/blackcore/afv/connection/apiserverconnection.cpp
index eda6585f9..e9e96e616 100644
--- a/src/blackcore/afv/connection/apiserverconnection.cpp
+++ b/src/blackcore/afv/connection/apiserverconnection.cpp
@@ -71,7 +71,7 @@ namespace BlackCore
                 request.setHeader(QNetworkRequest::ContentTypeHeader, "application/json");
 
                 // posted in QAM thread, reply is nullptr if called from another thread
-                QNetworkReply *reply = sApp->postToNetwork(request, CApplication::NoLogRequestId, QJsonDocument(obj).toJson(),
+                sApp->postToNetwork(request, CApplication::NoLogRequestId, QJsonDocument(obj).toJson(),
                 {
                     this, [ = ](QNetworkReply * nwReply)
                     {
@@ -125,7 +125,6 @@ namespace BlackCore
                         callback(m_isAuthenticated);
                     }
                 });
-                Q_UNUSED(reply)
             }
 
             PostCallsignResponseDto CApiServerConnection::addCallsign(const QString &callsign)
@@ -176,7 +175,7 @@ namespace BlackCore
                 QByteArray receivedData;
 
                 // posted in QAM thread, reply is nullptr if called from another thread
-                QNetworkReply *reply = sApp->getFromNetwork(request,
+                sApp->getFromNetwork(request,
                 {
                     this, [ =, &receivedData ](QNetworkReply * nwReply)
                     {
@@ -198,7 +197,6 @@ namespace BlackCore
                         if (loop) { loop->exit(); }
                     }
                 });
-                Q_UNUSED(reply)
 
                 if (loop) { loop->exec(); }
                 return receivedData;
@@ -212,7 +210,7 @@ namespace BlackCore
                 QByteArray receivedData;
 
                 // posted in QAM thread, reply is nullptr if called from another thread
-                QNetworkReply *reply = sApp->postToNetwork(request, CApplication::NoLogRequestId, data,
+                sApp->postToNetwork(request, CApplication::NoLogRequestId, data,
                 {
                     this, [ =, &receivedData ](QNetworkReply * nwReply)
                     {
@@ -234,7 +232,6 @@ namespace BlackCore
                         if (loop) { loop->exit(); }
                     }
                 });
-                Q_UNUSED(reply)
 
                 if (loop) { loop->exec(); }
                 return receivedData;
diff --git a/src/blackcore/afv/connection/clientconnection.cpp b/src/blackcore/afv/connection/clientconnection.cpp
index 9c418e816..1224cc841 100644
--- a/src/blackcore/afv/connection/clientconnection.cpp
+++ b/src/blackcore/afv/connection/clientconnection.cpp
@@ -61,15 +61,15 @@ namespace BlackCore
 
                         if (authenticated)
                         {
-                            const QString callsign = m_connection.getCallsign();
-                            m_connection.setTokens(m_apiServerConnection->addCallsign(callsign));
+                            const QString cs = m_connection.getCallsign();
+                            m_connection.setTokens(m_apiServerConnection->addCallsign(cs));
                             m_connection.setTsAuthenticatedToNow();
                             m_connection.createCryptoChannels();
                             m_connection.setTsHeartbeatToNow();
                             this->connectToVoiceServer();
                             // taskServerConnectionCheck.Start();
 
-                            CLogMessage(this).info(u"Connected: '%1' to voice server, socket open: %2") << callsign << boolToYesNo(m_udpSocket->isOpen());
+                            CLogMessage(this).info(u"Connected: '%1' to voice server, socket open: %2") << cs << boolToYesNo(m_udpSocket->isOpen());
                         }
                         else
                         {
diff --git a/src/blackcore/afv/crypto/cryptodtoserializer.h b/src/blackcore/afv/crypto/cryptodtoserializer.h
index 773b9c645..0d1427191 100644
--- a/src/blackcore/afv/crypto/cryptodtoserializer.h
+++ b/src/blackcore/afv/crypto/cryptodtoserializer.h
@@ -52,7 +52,6 @@ namespace BlackCore
                     headerBuffer.close();
                     const quint16 headerLength = static_cast<quint16>(headerBuffer.buffer().size());
 
-                    const QByteArray dtoNameBuffer = T::getDtoName();
                     const QByteArray dtoShortName = T::getShortDtoName();
                     const quint16 dtoNameLength = static_cast<quint16>(dtoShortName.size());
 
diff --git a/src/blackcore/aircraftmatcher.cpp b/src/blackcore/aircraftmatcher.cpp
index d7cc848b3..6ffe57d47 100644
--- a/src/blackcore/aircraftmatcher.cpp
+++ b/src/blackcore/aircraftmatcher.cpp
@@ -523,7 +523,7 @@ namespace BlackCore
         return rv;
     }
 
-    MatchingScriptReturnValues CAircraftMatcher::matchingScript(const QString &js, const CAircraftModel &inModel, const CAircraftModel &matchedModel, const CAircraftMatcherSetup &setup, const CAircraftModelList &modelSet, MatchingScript ms, CStatusMessageList *log)
+    MatchingScriptReturnValues CAircraftMatcher::matchingScript(const QString &js, const CAircraftModel &inModel, const CAircraftModel &matchedModel, const CAircraftMatcherSetup &setup, const CAircraftModelList &modelSet, MatchingScript script, CStatusMessageList *log)
     {
         MatchingScriptReturnValues rv(inModel);
         QString logMessage;
@@ -536,14 +536,14 @@ namespace BlackCore
             rv.runScript = true;
 
             // matching script
-            const bool msReverse = (ms == ReverseLookup);
+            const bool msReverse = (script == ReverseLookup);
             const QString lf = msReverse ? setup.getMsReverseLookupFile() : setup.getMsMatchingStageFile();
             static const QString logFileR = CFileUtils::appendFilePaths(CDirectoryUtils::logDirectory(), "logMatchingScriptReverseLookup.log");
             static const QString logFileM = CFileUtils::appendFilePaths(CDirectoryUtils::logDirectory(), "logMatchingScriptMatchingStage.log");
 
             if (log)
             {
-                CLogUtilities::addLogDetailsToList(log, callsign, QStringLiteral("Matching script (%1): '%2'").arg(msToString(ms), lf));
+                CLogUtilities::addLogDetailsToList(log, callsign, QStringLiteral("Matching script (%1): '%2'").arg(msToString(script), lf));
                 CLogUtilities::addLogDetailsToList(log, callsign, QStringLiteral("Matching script input model (%1): '%2'").arg(inModel.toQString(true)));
                 CLogUtilities::addLogDetailsToList(log, callsign, QStringLiteral("Matching script models: %1").arg(modelSet.coverageSummary()));
             }
diff --git a/src/blackcore/airspacemonitor.cpp b/src/blackcore/airspacemonitor.cpp
index 53adbd77a..959d1579e 100644
--- a/src/blackcore/airspacemonitor.cpp
+++ b/src/blackcore/airspacemonitor.cpp
@@ -1436,18 +1436,16 @@ namespace BlackCore
         bool canLikelySkipNearGround = correctedSituation.canLikelySkipNearGroundInterpolation();
         do
         {
-            if (canLikelySkipNearGround || correctedSituation.hasGroundElevation()) { break; }
-
-            // set a defined state
-            correctedSituation.resetGroundElevation();
-
             // Check if we can bail out and ignore all elevation handling
             //
             // rational:
             // a) elevation handling is expensive, and might even requests elevation from sim.
             // b) elevations not needed pollute the cache with "useless" values
             //
-            if (canLikelySkipNearGround) { break; }
+            if (canLikelySkipNearGround || correctedSituation.hasGroundElevation()) { break; }
+
+            // set a defined state
+            correctedSituation.resetGroundElevation();
 
             // Guessing gives better values, also for smaller planes
             // and avoids unnecessary elevation fetching for low flying smaller GA aircraft
diff --git a/src/blackcore/context/contextsimulatorimpl.cpp b/src/blackcore/context/contextsimulatorimpl.cpp
index 457046dcf..8204a8c89 100644
--- a/src/blackcore/context/contextsimulatorimpl.cpp
+++ b/src/blackcore/context/contextsimulatorimpl.cpp
@@ -862,7 +862,6 @@ namespace BlackCore
                 const CAircraftMatcherSetup setup = m_aircraftMatcher.getSetup();
                 if (setup.doModelAddFailover())
                 {
-                    const CCallsign cs = remoteAircraft.getCallsign();
                     const int trial = m_failoverAddingCounts.value(cs, 0);
                     if (trial < MaxModelAddedFailoverTrials)
                     {
diff --git a/src/blackcore/fsd/clientresponse.cpp b/src/blackcore/fsd/clientresponse.cpp
index e6d4e6a7d..035e61e05 100644
--- a/src/blackcore/fsd/clientresponse.cpp
+++ b/src/blackcore/fsd/clientresponse.cpp
@@ -15,7 +15,7 @@ namespace BlackCore
 {
     namespace Fsd
     {
-        ClientResponse::ClientResponse() : MessageBase()
+        ClientResponse::ClientResponse()
         { }
 
         ClientResponse::ClientResponse(const QString &sender, const QString &receiver, ClientQueryType queryType, const QStringList &responseData)
diff --git a/src/blackcore/fsd/clientresponse.h b/src/blackcore/fsd/clientresponse.h
index eef680478..283c2bc77 100644
--- a/src/blackcore/fsd/clientresponse.h
+++ b/src/blackcore/fsd/clientresponse.h
@@ -38,7 +38,7 @@ namespace BlackCore
             static QString pdu() { return "$CR"; }
 
             //! Properties @{
-            ClientQueryType m_queryType;
+            ClientQueryType m_queryType {};
             QStringList     m_responseData;
             //! @}
 
diff --git a/src/blackcore/fsd/flightplan.cpp b/src/blackcore/fsd/flightplan.cpp
index dd8b91875..38dfa1dc1 100644
--- a/src/blackcore/fsd/flightplan.cpp
+++ b/src/blackcore/fsd/flightplan.cpp
@@ -15,7 +15,7 @@ namespace BlackCore
 {
     namespace Fsd
     {
-        FlightPlan::FlightPlan() : MessageBase() { }
+        FlightPlan::FlightPlan() { }
 
         FlightPlan::FlightPlan(const QString &sender, const QString &receiver, FlightType flightType, const QString &aircraftIcaoType,
                                int trueCruisingSpeed, const QString &depAirport, int estimatedDepTime, int actualDepTime, const QString &cruiseAlt,
diff --git a/src/blackcore/fsd/flightplan.h b/src/blackcore/fsd/flightplan.h
index f6b5c8642..d68e73528 100644
--- a/src/blackcore/fsd/flightplan.h
+++ b/src/blackcore/fsd/flightplan.h
@@ -38,7 +38,7 @@ namespace BlackCore
             static QString pdu() { return "$FP"; }
 
             //! Properties @{
-            FlightType m_flightType;
+            FlightType m_flightType {};
             QString m_aircraftIcaoType;
             int m_trueCruisingSpeed = 0;
             QString m_depAirport;
diff --git a/src/blackcore/fsd/revbclientparts.h b/src/blackcore/fsd/revbclientparts.h
index cccd6095b..1cd930f8d 100644
--- a/src/blackcore/fsd/revbclientparts.h
+++ b/src/blackcore/fsd/revbclientparts.h
@@ -25,7 +25,7 @@ namespace BlackCore
         {
         public:
             //! Constructor
-            RevBClientParts(const QString &sender, const QString &partsval1, const QString &partsval3, const QString &partsval2);
+            RevBClientParts(const QString &sender, const QString &partsval1, const QString &partsval2, const QString &partsval3);
 
 
             //! Message converted to tokens
diff --git a/src/blackcore/fsd/servererror.cpp b/src/blackcore/fsd/servererror.cpp
index 84ee18a8c..891ce5aed 100644
--- a/src/blackcore/fsd/servererror.cpp
+++ b/src/blackcore/fsd/servererror.cpp
@@ -15,7 +15,7 @@ namespace BlackCore
 {
     namespace Fsd
     {
-        ServerError::ServerError() : MessageBase()
+        ServerError::ServerError()
         { }
 
         ServerError::ServerError(const QString &sender, const QString &receiver, ServerErrorCode errorCode, const QString &causingParameter, const QString &description)
diff --git a/src/blackcore/fsd/servererror.h b/src/blackcore/fsd/servererror.h
index 8804d0425..06bd8ac3f 100644
--- a/src/blackcore/fsd/servererror.h
+++ b/src/blackcore/fsd/servererror.h
@@ -43,7 +43,7 @@ namespace BlackCore
             //! @}
 
             //! Properties @{
-            ServerErrorCode m_errorNumber;
+            ServerErrorCode m_errorNumber {};
             QString m_causingParameter;
             QString m_description;
             //! @}
diff --git a/src/blackcore/setupreader.cpp b/src/blackcore/setupreader.cpp
index 0b14b5a20..5832bd5f3 100644
--- a/src/blackcore/setupreader.cpp
+++ b/src/blackcore/setupreader.cpp
@@ -431,8 +431,8 @@ namespace BlackCore
                     {
                         // no issue with cache
                         m_updateInfoUrls = loadedSetup.getSwiftUpdateInfoFileUrls();
-                        const CStatusMessage m = CLogMessage(this).info(u"Loaded setup from '%1'") << urlString;
-                        emit this->setupLoadingMessages(m);
+                        const CStatusMessage m2 = CLogMessage(this).info(u"Loaded setup from '%1'") << urlString;
+                        emit this->setupLoadingMessages(m2);
                         CLogMessage(this).info(u"Setup: Updated data cache in '%1'") << m_setup.getFilename();
                         {
                             QWriteLocker l(&m_lockSetup);
diff --git a/src/blackgui/components/dblogincomponent.cpp b/src/blackgui/components/dblogincomponent.cpp
index 621ecd976..1a98950a8 100644
--- a/src/blackgui/components/dblogincomponent.cpp
+++ b/src/blackgui/components/dblogincomponent.cpp
@@ -49,8 +49,7 @@ namespace BlackGui
             Q_ASSERT_X(sGui, Q_FUNC_INFO, "Missing sGui");
             ui->setupUi(this);
             this->setModeLogin(true);
-            const CUrl url(sGui->getGlobalSetup().getDbHomePageUrl());
-            const QString urlString = asHyperlink(url.getFullUrl());
+            const QString urlString = asHyperlink(sGui->getGlobalSetup().getDbHomePageUrl().getFullUrl());
             QString html = ui->tbr_InfoAndHints->toHtml();
             html = html.replace("##swiftDB##", urlString, Qt::CaseInsensitive);
             html = html.replace("##swiftEnableSSO##", urlString, Qt::CaseInsensitive);
diff --git a/src/blackgui/components/flightplancomponent.cpp b/src/blackgui/components/flightplancomponent.cpp
index f5bc02daa..72ddb2d63 100644
--- a/src/blackgui/components/flightplancomponent.cpp
+++ b/src/blackgui/components/flightplancomponent.cpp
@@ -1015,7 +1015,6 @@ namespace BlackGui
         void CFlightPlanComponent::setRemarksUIValues(const QString &remarks)
         {
             if (remarks.isEmpty()) { return; }
-            const QString r = remarks.toUpper();
 
             if (remarks.contains("/V"))
             {
diff --git a/src/blackgui/components/loginadvcomponent.cpp b/src/blackgui/components/loginadvcomponent.cpp
index 9ae346ca9..3359cd916 100644
--- a/src/blackgui/components/loginadvcomponent.cpp
+++ b/src/blackgui/components/loginadvcomponent.cpp
@@ -310,11 +310,7 @@ namespace BlackGui
 
         void CLoginAdvComponent::setGuiLoginAsValues(const CSimulatedAircraft &ownAircraft)
         {
-            const QString ac(
-                ownAircraft.getAircraftIcaoCodeDesignator() %
-                (ownAircraft.hasAirlineDesignator() ? (u' ' % ownAircraft.getAirlineIcaoCodeDesignator()) : QString()) %
-                (ownAircraft.hasModelString() ? (u' ' % ownAircraft.getModelString()) : QString())
-            );
+            Q_UNUSED(ownAircraft)
         }
 
         CServer CLoginAdvComponent::getCurrentVatsimServer() const
@@ -382,7 +378,6 @@ namespace BlackGui
 
             // in any case override if connected
             ui->comp_OwnAircraft->setOwnModelAndIcaoValues();
-            const CServer server = nwc->getConnectedServer();
             ui->comp_NetworkDetails->setLoginMode(nwc->getLoginMode());
             const CSimulatedAircraft ownAircraft = sGui->getIContextOwnAircraft()->getOwnAircraft();
             this->setGuiLoginAsValues(ownAircraft);
diff --git a/src/blackgui/components/modelmatchercomponent.cpp b/src/blackgui/components/modelmatchercomponent.cpp
index 0b52c8617..7a6616fd2 100644
--- a/src/blackgui/components/modelmatchercomponent.cpp
+++ b/src/blackgui/components/modelmatchercomponent.cpp
@@ -133,8 +133,8 @@ namespace BlackGui
                     ui->tvp_ResultMessages->insert(m);
                     return;
                 }
-                CSimulatorInfo simulator = models.simulatorsWithMaxEntries();
-                m_matcher.setModelSet(models, simulator, true);
+                CSimulatorInfo si = models.simulatorsWithMaxEntries();
+                m_matcher.setModelSet(models, si, true);
             }
             else
             {
@@ -150,7 +150,7 @@ namespace BlackGui
             this->onSimulatorChanged(ui->comp_SimulatorSelector->getValue());
         }
 
-        void CModelMatcherComponent::onCacheChanged(CSimulatorInfo &simulator)
+        void CModelMatcherComponent::onCacheChanged(const CSimulatorInfo &simulator)
         {
             Q_UNUSED(simulator);
             this->redisplay();
diff --git a/src/blackgui/components/modelmatchercomponent.h b/src/blackgui/components/modelmatchercomponent.h
index fad7d28b4..fef942a6c 100644
--- a/src/blackgui/components/modelmatchercomponent.h
+++ b/src/blackgui/components/modelmatchercomponent.h
@@ -61,7 +61,7 @@ namespace BlackGui
             void onWorkbenchToggled(bool checked);
 
             //! Cache changed
-            void onCacheChanged(BlackMisc::Simulation::CSimulatorInfo &simulator);
+            void onCacheChanged(const BlackMisc::Simulation::CSimulatorInfo &simulator);
 
             //! Web data have been read
             void onWebDataRead(BlackMisc::Network::CEntityFlags::Entity entity, BlackMisc::Network::CEntityFlags::ReadState state, int number, const QUrl &url);
diff --git a/src/blackgui/components/networkdetailscomponent.cpp b/src/blackgui/components/networkdetailscomponent.cpp
index e93d2bba2..b532cb477 100644
--- a/src/blackgui/components/networkdetailscomponent.cpp
+++ b/src/blackgui/components/networkdetailscomponent.cpp
@@ -179,8 +179,6 @@ namespace BlackGui
         void CNetworkDetailsComponent::onSelectedServerChanged(const CServer &server)
         {
             if (!m_updatePilotOnServerChanges) { return; }
-            const bool vatsim = this->isVatsimServerSelected();
-            const CUser user = vatsim ? this->getCurrentVatsimServer().getUser() : server.getUser();
             emit this->overridePilot(server.getUser());
         }
 
diff --git a/src/blackgui/components/radarcomponent.cpp b/src/blackgui/components/radarcomponent.cpp
index bd91c3a9d..230ba7148 100644
--- a/src/blackgui/components/radarcomponent.cpp
+++ b/src/blackgui/components/radarcomponent.cpp
@@ -295,7 +295,7 @@ namespace BlackGui
             // in which North=(1,0) and East=(-1,0)
             // but we want North=(0,-1) and East=(0,1)
             // (QGraphicsView y axis increases downwards)
-            qSwap(p.rx(), p.ry());
+            std::swap(p.rx(), p.ry());
             p.setX(-p.x());
             p.setY(-p.y());
             return p;
diff --git a/src/blackgui/components/settingsfontcomponent.cpp b/src/blackgui/components/settingsfontcomponent.cpp
index 946aec3f2..3ad0a2dae 100644
--- a/src/blackgui/components/settingsfontcomponent.cpp
+++ b/src/blackgui/components/settingsfontcomponent.cpp
@@ -98,7 +98,6 @@ namespace BlackGui
             const QString fontFamily = ui->cb_SettingsGuiFont->currentFont().family();
             const QString fontStyleCombined = ui->cb_SettingsGuiFontStyle->currentText();
 
-            const QStringList familySizeStyle = this->getFamilySizeStyle();
             QString fontColor = m_selectedColor.name();
             if (!m_selectedColor.isValid() || m_selectedColor.name().isEmpty())
             {
diff --git a/src/blackgui/components/settingsnetworkserverscomponent.cpp b/src/blackgui/components/settingsnetworkserverscomponent.cpp
index fee275339..a9d4f0c4e 100644
--- a/src/blackgui/components/settingsnetworkserverscomponent.cpp
+++ b/src/blackgui/components/settingsnetworkserverscomponent.cpp
@@ -101,6 +101,7 @@ namespace BlackGui
             else
             {
                 qFatal("Wrong sender");
+                // cppcheck-suppress duplicateBreak
                 return;
             }
 
diff --git a/src/blackgui/views/aircraftcategorytreeview.cpp b/src/blackgui/views/aircraftcategorytreeview.cpp
index a79716073..8ff86c70b 100644
--- a/src/blackgui/views/aircraftcategorytreeview.cpp
+++ b/src/blackgui/views/aircraftcategorytreeview.cpp
@@ -88,8 +88,6 @@ namespace BlackGui
 
         CAircraftCategory CAircraftCategoryTreeView::selectedObject() const
         {
-            const QModelIndex index = this->currentIndex();
-            const QVariant data = this->model()->data(index.siblingAtColumn(0));
             const CAircraftCategoryTreeModel *model = this->categoryModel();
             if (!model) { return CAircraftCategory(); }
             return model->container().frontOrDefault();
diff --git a/src/blackgui/views/viewbase.h b/src/blackgui/views/viewbase.h
index 2d3fd1b5a..4aa7ac002 100644
--- a/src/blackgui/views/viewbase.h
+++ b/src/blackgui/views/viewbase.h
@@ -706,10 +706,10 @@ namespace BlackGui
             int removeIf(K0 k0, V0 v0, KeysValues... keysValues)
             {
                 if (this->rowCount() < 1) { return 0; }
-                ContainerType copy(container());
-                int r = copy.removeIf(k0, v0, keysValues...);
+                ContainerType cp(container());
+                int r = cp.removeIf(k0, v0, keysValues...);
                 if (r < 1) { return 0; }
-                this->updateContainerMaybeAsync(copy);
+                this->updateContainerMaybeAsync(cp);
                 return r;
             }
 
@@ -717,9 +717,9 @@ namespace BlackGui
             template <class K1, class V1>
             void replaceOrAdd(K1 key1, V1 value1, const ObjectType &replacement)
             {
-                ContainerType copy(container());
-                copy.replaceOrAdd(key1, value1, replacement);
-                this->updateContainerMaybeAsync(copy);
+                ContainerType cp(container());
+                cp.replaceOrAdd(key1, value1, replacement);
+                this->updateContainerMaybeAsync(cp);
             }
 
             //! \name Slot overrides from base class
diff --git a/src/blackinput/win/keyboardwindows.cpp b/src/blackinput/win/keyboardwindows.cpp
index 7fb99478a..de1894d23 100644
--- a/src/blackinput/win/keyboardwindows.cpp
+++ b/src/blackinput/win/keyboardwindows.cpp
@@ -112,6 +112,7 @@ namespace BlackInput
 
     bool CKeyboardWindows::init()
     {
+        // cppcheck-suppress knownConditionTrueFalse
         if (useWindowsHook)
         {
             Q_ASSERT_X(g_keyboardWindows == nullptr, "CKeyboardWindows::init", "Windows supports only one keyboard instance. Cannot initialize a second one!");
diff --git a/src/blackmisc/algorithm.h b/src/blackmisc/algorithm.h
index c407181b3..ef85ae7cd 100644
--- a/src/blackmisc/algorithm.h
+++ b/src/blackmisc/algorithm.h
@@ -175,6 +175,7 @@ namespace BlackMisc
             static_cast<void>(std::initializer_list<int>
             {
                 //! \fixme C-style cast is needed due to a clang bug: https://bugs.llvm.org/show_bug.cgi?id=39375
+                // cppcheck-suppress accessForwarded
                 ((void)(std::forward<F>(visitor)(std::get<Is * 2>(std::forward<T>(tuple)), std::get<Is * 2 + 1>(std::forward<T>(tuple)))), 0)...
             });
         }
diff --git a/src/blackmisc/aviation/airlineicaocode.cpp b/src/blackmisc/aviation/airlineicaocode.cpp
index 5d8e4adca..95742e97d 100644
--- a/src/blackmisc/aviation/airlineicaocode.cpp
+++ b/src/blackmisc/aviation/airlineicaocode.cpp
@@ -495,11 +495,10 @@ namespace BlackMisc
             QSet<int> ids;
             dir.setFilter(QDir::Files | QDir::NoSymLinks);
             dir.setSorting(QDir::Name);
-            bool ok = false;
             for (const QFileInfo &fileInfo : dir.entryInfoList())
             {
                 const QString fn(fileInfo.fileName());
-                ok = fn.size() > 5;
+                bool ok = fn.size() > 5;
                 if (!ok) { continue; }
                 BLACK_VERIFY_X(ok, Q_FUNC_INFO, "wrong file name");
                 const int id = fn.leftRef(5).toInt(&ok);
diff --git a/src/blackmisc/datacache.cpp b/src/blackmisc/datacache.cpp
index 22112836e..40979dd1a 100644
--- a/src/blackmisc/datacache.cpp
+++ b/src/blackmisc/datacache.cpp
@@ -233,7 +233,7 @@ namespace BlackMisc
     {
         QMutexLocker lock(&m_mutex);
         decltype(m_queue) queue;
-        qSwap(m_queue, queue);
+        std::swap(m_queue, queue);
         lock.unlock();
 
         for (const auto &pair : BlackMisc::as_const(queue))
@@ -391,13 +391,13 @@ namespace BlackMisc
             {
                 m_originalTimestamps = fromJson(json.value("timestamps").toObject());
 
-                QUuid uuid(json.value("uuid").toString());
-                if (uuid == m_uuid && m_admittedQueue.isEmpty())
+                QUuid id(json.value("uuid").toString());
+                if (id == m_uuid && m_admittedQueue.isEmpty())
                 {
                     if (m_pendingWrite) { return guard; }
                     return {};
                 }
-                if (updateUuid) { m_uuid = uuid; }
+                if (updateUuid) { m_uuid = id; }
 
                 auto timesToLive = fromJson(json.value("ttl").toObject());
                 for (auto it = m_originalTimestamps.cbegin(); it != m_originalTimestamps.cend(); ++it)
@@ -807,19 +807,19 @@ namespace BlackMisc
             return;
         }
         auto json = QJsonDocument::fromJson(file.readAll()).object();
-        QUuid uuid(json.value("uuid").toString());
+        QUuid id(json.value("uuid").toString());
         CSequence<CProcessInfo> apps;
         auto status = apps.convertFromJsonNoThrow(json.value("apps").toObject(), this, QStringLiteral("Error in %1 apps object").arg(m_filename));
         apps.removeIf([](const CProcessInfo & pi) { return ! pi.exists(); });
 
-        if (apps.isEmpty()) { uuid = CIdentifier().toUuid(); }
-        m_uuid = uuid;
+        if (apps.isEmpty()) { id = CIdentifier().toUuid(); }
+        m_uuid = id;
 
         CProcessInfo currentProcess = CProcessInfo::currentProcess();
         Q_ASSERT(currentProcess.exists());
         apps.replaceOrAdd(currentProcess);
         json.insert("apps", apps.toJson());
-        json.insert("uuid", uuid.toString());
+        json.insert("uuid", m_uuid.toString());
         if (file.seek(0) && file.resize(0) && file.write(QJsonDocument(json).toJson()))
         {
             if (!file.checkedClose())
diff --git a/src/blackmisc/geo/coordinategeodetic.cpp b/src/blackmisc/geo/coordinategeodetic.cpp
index f9c186ec6..352ce6a61 100644
--- a/src/blackmisc/geo/coordinategeodetic.cpp
+++ b/src/blackmisc/geo/coordinategeodetic.cpp
@@ -474,6 +474,7 @@ namespace BlackMisc
                 default:
                     const QString m = QString("no property, index ").append(index.toQString());
                     Q_ASSERT_X(false, Q_FUNC_INFO, m.toLocal8Bit().constData());
+                    Q_UNUSED(m)
                     break;
                 }
             }
diff --git a/src/blackmisc/json.cpp b/src/blackmisc/json.cpp
index 214c0d4f2..e84a18111 100644
--- a/src/blackmisc/json.cpp
+++ b/src/blackmisc/json.cpp
@@ -544,7 +544,6 @@ namespace BlackMisc
         QJsonObject unwrapCache(const QJsonObject &object)
         {
             if (object.size() != 1) { return object; } // no cache format
-            const QString key = object.constBegin().key();
             const QJsonObject cacheObject = object.constBegin()->toObject();
             if (cacheObject.contains("type") && cacheObject.contains("value"))
             {
diff --git a/src/blackmisc/network/textmessage.cpp b/src/blackmisc/network/textmessage.cpp
index e809bc159..ad56cb732 100644
--- a/src/blackmisc/network/textmessage.cpp
+++ b/src/blackmisc/network/textmessage.cpp
@@ -252,7 +252,7 @@ namespace BlackMisc
 
         void CTextMessage::toggleSenderRecipient()
         {
-            qSwap(m_senderCallsign, m_recipientCallsign);
+            std::swap(m_senderCallsign, m_recipientCallsign);
         }
 
         bool CTextMessage::isSelcalMessage() const
diff --git a/src/blackmisc/network/textmessagelist.cpp b/src/blackmisc/network/textmessagelist.cpp
index b1bedc8ec..17ecf0179 100644
--- a/src/blackmisc/network/textmessagelist.cpp
+++ b/src/blackmisc/network/textmessagelist.cpp
@@ -48,7 +48,7 @@ namespace BlackMisc
             this->push_back(message);
         }
 
-        CTextMessageList::CTextMessageList(const QString &message, const QList<CFrequency> &frequencies, const BlackMisc::Aviation::CCallsign &fromCallsign)
+        CTextMessageList::CTextMessageList(const QString &message, const QList<CFrequency> &frequencies, const CCallsign &fromCallsign)
         {
             if (frequencies.isEmpty()) return;
             for (const CFrequency &frequency : frequencies)
diff --git a/src/blackmisc/network/textmessagelist.h b/src/blackmisc/network/textmessagelist.h
index b5e9f6b52..a8083b24d 100644
--- a/src/blackmisc/network/textmessagelist.h
+++ b/src/blackmisc/network/textmessagelist.h
@@ -50,13 +50,13 @@ namespace BlackMisc
             CTextMessageList(const QString &message, const Aviation::CCallsign &senderCallsign, const Aviation::CCallsign &recipientCallsign);
 
             //! Constructor, single radio message
-            CTextMessageList(const QString &message, const PhysicalQuantities::CFrequency &frequency, const Aviation::CCallsign &senderCallsign = Aviation::CCallsign());
+            CTextMessageList(const QString &message, const PhysicalQuantities::CFrequency &frequency, const Aviation::CCallsign &senderCallsign = {});
 
             //! Constructor, single message
             CTextMessageList(const CTextMessage &message);
 
             //! Constructor, multi-frequency radio messages
-            CTextMessageList(const QString &message, const QList<PhysicalQuantities::CFrequency> &frequencies, const Aviation::CCallsign &sender = Aviation::CCallsign());
+            CTextMessageList(const QString &message, const QList<PhysicalQuantities::CFrequency> &frequencies, const Aviation::CCallsign &fromCallsign = {});
 
             //! Construct from a base class object.
             CTextMessageList(const CSequence<CTextMessage> &other);
diff --git a/src/blackmisc/simulation/fscommon/fscommonutil.cpp b/src/blackmisc/simulation/fscommon/fscommonutil.cpp
index bd56ed11d..0cdc9ee18 100644
--- a/src/blackmisc/simulation/fscommon/fscommonutil.cpp
+++ b/src/blackmisc/simulation/fscommon/fscommonutil.cpp
@@ -633,15 +633,15 @@ namespace BlackMisc
                     // make absolute
                     if (!soPath.left(3).contains(':')) { soPath = CFileUtils::appendFilePaths(relPath, soPath); }
 
-                    const QDir p(soPath); // always absolute path now
-                    if (checked && !p.exists())
+                    const QDir dir(soPath); // always absolute path now
+                    if (checked && !dir.exists())
                     {
                         // skip, not existing
-                        if (logConfigPathReading()) { CLogMessage(getLogCategories()).info(u"FSX SimObjects path skipped, not existing: '%1' in '%2'") << p.absolutePath() << fsxFile; }
+                        if (logConfigPathReading()) { CLogMessage(getLogCategories()).info(u"FSX SimObjects path skipped, not existing: '%1' in '%2'") << dir.absolutePath() << fsxFile; }
                         continue;
                     }
 
-                    const QString afp = p.absolutePath().toLower();
+                    const QString afp = dir.absolutePath().toLower();
                     if (!CDirectoryUtils::containsFileInDir(afp, airFileFilter(), true))
                     {
                         if (logConfigPathReading()) { CLogMessage(getLogCategories()).info(u"FSX SimObjects path: Skipping '%1' from '%2', no '%3' file") << afp << fsxFile << airFileFilter(); }
diff --git a/src/blackmisc/simulation/interpolator.cpp b/src/blackmisc/simulation/interpolator.cpp
index 100e4c6f8..7660d5841 100644
--- a/src/blackmisc/simulation/interpolator.cpp
+++ b/src/blackmisc/simulation/interpolator.cpp
@@ -302,7 +302,7 @@ namespace BlackMisc
                     }
                     else
                     {
-                        const qint64 diff = noSituation ? -1 : m_currentTimeMsSinceEpoch - currentSituation.getAdjustedMSecsSinceEpoch();
+                        const qint64 diff = m_currentTimeMsSinceEpoch - currentSituation.getAdjustedMSecsSinceEpoch();
                         m = CStatusMessage(this).warning(u"Invalid situation, diff. %1ms #%2 for interpolation reported for '%3' (Interpolant: %4 interpolation: %5)") <<
                             diff << m_invalidSituations << m_callsign.asString() << boolToTrueFalse(isValidInterpolant) << boolToTrueFalse(isValidInterpolation);
                     }
@@ -609,10 +609,10 @@ namespace BlackMisc
             }
             else
             {
-                CAircraftModel model = this->getAircraftInRangeForCallsign(m_callsign).getModel();
-                if (model.hasModelString())
+                CAircraftModel foundModel = this->getAircraftInRangeForCallsign(m_callsign).getModel();
+                if (foundModel.hasModelString())
                 {
-                    m_model = model;
+                    m_model = foundModel;
                 }
             }
             this->getAndFetchModelCG(model.getCG());
diff --git a/src/blackmisc/simulation/settings/simulatorsettings.cpp b/src/blackmisc/simulation/settings/simulatorsettings.cpp
index 2c0b2097e..8e7f8dfbe 100644
--- a/src/blackmisc/simulation/settings/simulatorsettings.cpp
+++ b/src/blackmisc/simulation/settings/simulatorsettings.cpp
@@ -126,7 +126,7 @@ namespace BlackMisc
                 return true;
             }
 
-            bool CSimulatorSettings::setRecordedGndRadius(CLength &radius)
+            bool CSimulatorSettings::setRecordedGndRadius(const CLength &radius)
             {
                 if (radius == m_recordedGndRadius) { return false; }
                 m_recordedGndRadius = radius;
diff --git a/src/blackmisc/simulation/settings/simulatorsettings.h b/src/blackmisc/simulation/settings/simulatorsettings.h
index c9fb3295a..ea78291f4 100644
--- a/src/blackmisc/simulation/settings/simulatorsettings.h
+++ b/src/blackmisc/simulation/settings/simulatorsettings.h
@@ -124,7 +124,7 @@ namespace BlackMisc
                 BlackMisc::PhysicalQuantities::CLength getRecordedGndRadius() const { return m_recordedGndRadius; }
 
                 //! Record GND values with radius
-                bool setRecordedGndRadius(BlackMisc::PhysicalQuantities::CLength &radius);
+                bool setRecordedGndRadius(const BlackMisc::PhysicalQuantities::CLength &radius);
 
                 //! Reset the paths
                 void resetPaths();
diff --git a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
index 6caa7beb2..3d18b2d51 100644
--- a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
+++ b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
@@ -575,15 +575,15 @@ namespace BlackMisc
                         return false;
                     }
 
-                    QFileInfo fileInfo(absoluteTexPath);
-                    if (!fileInfo.exists())
+                    QFileInfo texFileInfo(absoluteTexPath);
+                    if (!texFileInfo.exists())
                     {
                         const CStatusMessage m = CStatusMessage(this).error(u"%1/xsb_aircraft.txt Line %2 : Texture '%3' does not exist.") << path << lineNum << absoluteTexPath;
                         m_loadingMessages.push_back(m);
                         return false;
                     }
 
-                    package.planes.back().textureName = fileInfo.completeBaseName();
+                    package.planes.back().textureName = texFileInfo.completeBaseName();
                 }
                 return true;
             }
diff --git a/src/blacksound/audioutilities.cpp b/src/blacksound/audioutilities.cpp
index fcd930d78..a99c230ff 100644
--- a/src/blacksound/audioutilities.cpp
+++ b/src/blacksound/audioutilities.cpp
@@ -19,7 +19,7 @@ using namespace BlackMisc::Audio;
 
 namespace BlackSound
 {
-    QVector<float> convertBytesTo32BitFloatPCM(const QByteArray input)
+    QVector<float> convertBytesTo32BitFloatPCM(const QByteArray &input)
     {
         int inputSamples = input.size() / 2; // 16 bit input, so 2 bytes per sample
         QVector<float> output;
@@ -33,7 +33,7 @@ namespace BlackSound
         return output;
     }
 
-    QVector<qint16> convertBytesTo16BitPCM(const QByteArray input)
+    QVector<qint16> convertBytesTo16BitPCM(const QByteArray &input)
     {
         const int inputSamples = input.size() / 2; // 16 bit input, so 2 bytes per sample
         QVector<qint16> output;
@@ -45,7 +45,7 @@ namespace BlackSound
         return output;
     }
 
-    QVector<qint16> convertFloatBytesTo16BitPCM(const QByteArray input)
+    QVector<qint16> convertFloatBytesTo16BitPCM(const QByteArray &input)
     {
         Q_UNUSED(input)
         // qFatal("Not implemented");
diff --git a/src/blacksound/audioutilities.h b/src/blacksound/audioutilities.h
index 431b49e6f..798b72484 100644
--- a/src/blacksound/audioutilities.h
+++ b/src/blacksound/audioutilities.h
@@ -21,9 +21,9 @@
 namespace BlackSound
 {
     //! Conversion functions @{
-    BLACKSOUND_EXPORT QVector<float>  convertBytesTo32BitFloatPCM(const QByteArray input);
-    BLACKSOUND_EXPORT QVector<qint16> convertBytesTo16BitPCM(const QByteArray input);
-    BLACKSOUND_EXPORT QVector<qint16> convertFloatBytesTo16BitPCM(const QByteArray input);
+    BLACKSOUND_EXPORT QVector<float>  convertBytesTo32BitFloatPCM(const QByteArray &input);
+    BLACKSOUND_EXPORT QVector<qint16> convertBytesTo16BitPCM(const QByteArray &input);
+    BLACKSOUND_EXPORT QVector<qint16> convertFloatBytesTo16BitPCM(const QByteArray &input);
     BLACKSOUND_EXPORT QVector<float>  convertFromMonoToStereo(const QVector<float> &mono);
     BLACKSOUND_EXPORT QVector<qint16> convertFromStereoToMono(const QVector<qint16> &stereo);
     BLACKSOUND_EXPORT QVector<float>  convertFromShortToFloat(const QVector<qint16> &input);
diff --git a/src/blacksound/codecs/opusdecoder.cpp b/src/blacksound/codecs/opusdecoder.cpp
index 4b686e16c..f86ec2c45 100644
--- a/src/blacksound/codecs/opusdecoder.cpp
+++ b/src/blacksound/codecs/opusdecoder.cpp
@@ -31,7 +31,7 @@ namespace BlackSound
             return bufferSize / bytesPerSample;
         }
 
-        QVector<qint16> COpusDecoder::decode(const QByteArray opusData, int dataLength, int *decodedLength)
+        QVector<qint16> COpusDecoder::decode(const QByteArray &opusData, int dataLength, int *decodedLength)
         {
             QVector<qint16> decoded(MaxDataBytes, 0);
             int count = frameCount(MaxDataBytes);
diff --git a/src/blacksound/codecs/opusdecoder.h b/src/blacksound/codecs/opusdecoder.h
index 9db72449a..107c38d91 100644
--- a/src/blacksound/codecs/opusdecoder.h
+++ b/src/blacksound/codecs/opusdecoder.h
@@ -39,7 +39,7 @@ namespace BlackSound
             int frameCount(int bufferSize);
 
             //! Decode
-            QVector<qint16> decode(const QByteArray opusData, int dataLength, int *decodedLength);
+            QVector<qint16> decode(const QByteArray &opusData, int dataLength, int *decodedLength);
 
             //! Reset
             void resetState();
diff --git a/src/blacksound/codecs/opusencoder.cpp b/src/blacksound/codecs/opusencoder.cpp
index 5efbdfb6f..0b3bb137d 100644
--- a/src/blacksound/codecs/opusencoder.cpp
+++ b/src/blacksound/codecs/opusencoder.cpp
@@ -12,9 +12,7 @@ namespace BlackSound
 {
     namespace Codecs
     {
-        COpusEncoder::COpusEncoder(int sampleRate, int channels, int application) :
-            m_sampleRate(sampleRate),
-            m_channels(channels)
+        COpusEncoder::COpusEncoder(int sampleRate, int channels, int application)
         {
             int error;
             opusEncoder = opus_encoder_create(sampleRate, channels, application, &error);
@@ -30,7 +28,7 @@ namespace BlackSound
             opus_encoder_ctl(opusEncoder, OPUS_SET_BITRATE(bitRate));
         }
 
-        QByteArray COpusEncoder::encode(const QVector<qint16> pcmSamples, int samplesLength, int *encodedLength)
+        QByteArray COpusEncoder::encode(const QVector<qint16> &pcmSamples, int samplesLength, int *encodedLength)
         {
             QByteArray encoded(maxDataBytes, 0);
             int length = opus_encode(opusEncoder, reinterpret_cast<const opus_int16 *>(pcmSamples.data()), samplesLength, reinterpret_cast<unsigned char *>(encoded.data()), maxDataBytes);
diff --git a/src/blacksound/codecs/opusencoder.h b/src/blacksound/codecs/opusencoder.h
index 19006b6ef..f4753c60f 100644
--- a/src/blacksound/codecs/opusencoder.h
+++ b/src/blacksound/codecs/opusencoder.h
@@ -40,20 +40,11 @@ namespace BlackSound
             //! Bit rate
             void setBitRate(int bitRate);
 
-            //! \param frameCount Number of audio samples per frame
-            //! \returns the size of an audio frame in bytes
-            int frameByteCount(int frameCount);
-
-            //! Frame count
-            int frameCount(const QVector<qint16> pcmSamples);
-
             //! Encode
-            QByteArray encode(const QVector<qint16> pcmSamples, int samplesLength, int *encodedLength);
+            QByteArray encode(const QVector<qint16> &pcmSamples, int samplesLength, int *encodedLength);
 
         private:
             OpusEncoder *opusEncoder = nullptr;
-            int m_sampleRate;
-            int m_channels;
 
             static constexpr int maxDataBytes = 4000;
         };
diff --git a/src/plugins/simulator/emulated/simulatoremulated.cpp b/src/plugins/simulator/emulated/simulatoremulated.cpp
index 47fb288fb..8ca3bf926 100644
--- a/src/plugins/simulator/emulated/simulatoremulated.cpp
+++ b/src/plugins/simulator/emulated/simulatoremulated.cpp
@@ -581,7 +581,6 @@ namespace BlackSimPlugin
         {
             if (!m_isWeatherActivated) { return false; }
 
-            const CWeatherScenario s = m_weatherScenarioSettings.get();
             this->getOwnAircraftPosition();
             const CCoordinateGeodetic currentPosition = this->getOwnAircraftPosition();
             this->requestWeatherGrid(currentPosition, this->identifier());
diff --git a/src/plugins/simulator/fs9/multiplayerpacketparser.h b/src/plugins/simulator/fs9/multiplayerpacketparser.h
index 6612286cd..e563752b8 100644
--- a/src/plugins/simulator/fs9/multiplayerpacketparser.h
+++ b/src/plugins/simulator/fs9/multiplayerpacketparser.h
@@ -61,7 +61,7 @@ namespace BlackSimPlugin
             struct Serializer<MsgTuple, 0>
             {
                 static const QByteArray &read(const QByteArray &data, MsgTuple &) { return data; }
-                static QByteArray write(QByteArray &data, const MsgTuple &)      { return data; }
+                static QByteArray write(const QByteArray &data, const MsgTuple &) { return data; }
             };
 
             template< typename MessageTuple, quint32 Size >
diff --git a/src/plugins/simulator/fscommon/fsuipcdummy.cpp b/src/plugins/simulator/fscommon/fsuipcdummy.cpp
index 7429e4fc3..8174b3f8f 100644
--- a/src/plugins/simulator/fscommon/fsuipcdummy.cpp
+++ b/src/plugins/simulator/fscommon/fsuipcdummy.cpp
@@ -78,6 +78,7 @@ namespace BlackSimPlugin
             return QStringLiteral("N/A");
         }
 
+        // cppcheck-suppress constParameter
         bool CFsuipc::read(CSimulatedAircraft &aircraft, bool cockpit, bool situation, bool aircraftParts)
         {
             Q_UNUSED(aircraft);
diff --git a/src/plugins/simulator/fscommon/fsuipcimpl.cpp b/src/plugins/simulator/fscommon/fsuipcimpl.cpp
index c0b638b5c..0f95993de 100644
--- a/src/plugins/simulator/fscommon/fsuipcimpl.cpp
+++ b/src/plugins/simulator/fscommon/fsuipcimpl.cpp
@@ -453,9 +453,6 @@ namespace BlackSimPlugin
             {
                 read = true;
 
-                // time, basically as a heartbeat
-                QString fsTime = QString::asprintf("%02d:%02d:%02d", localFsTimeRaw[0], localFsTimeRaw[1], localFsTimeRaw[2]);
-
                 if (cockpit)
                 {
                     // COMs
@@ -491,6 +488,7 @@ namespace BlackSimPlugin
                     // position
                     const double latCorrectionFactor = 90.0 / (10001750.0 * 65536.0 * 65536.0);
                     const double lonCorrectionFactor = 360.0 / (65536.0 * 65536.0 * 65536.0 * 65536.0);
+                    // cppcheck-suppress shadowArgument
                     CAircraftSituation situation = aircraft.getSituation();
                     CCoordinateGeodetic position = situation.getPosition();
                     CLatitude  lat(latitudeRaw  * latCorrectionFactor, CAngleUnit::deg());
diff --git a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
index ffb226aa1..52029c5aa 100644
--- a/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
+++ b/src/plugins/simulator/fsxcommon/simulatorfsxcommon.cpp
@@ -1106,7 +1106,6 @@ namespace BlackSimPlugin
             CAircraftModel model = simObject.getAircraftModel();
 
             const CSpecializedSimulatorSettings settings = this->getSimulatorSettings();
-            const QStringList modelDirectories = settings.getModelDirectoriesFromSimulatorDirectoryOrDefault();
             const bool fileExists = CFsCommonUtil::adjustFileDirectory(model, settings.getModelDirectoriesOrDefault());
             bool canBeUsed = true;
 
@@ -1586,7 +1585,6 @@ namespace BlackSimPlugin
                 if (situations.isEmpty())
                 {
                     CLogMessage(this).warning(u"No valid situations for '%1', will be added as pending") << callsign.asString();
-                    canAdd = false;
                 }
                 else
                 {
@@ -1596,11 +1594,10 @@ namespace BlackSimPlugin
                 }
 
                 // still invalid?
-                const bool invalidSituation = situation.isPositionOrAltitudeNull();
-                canAdd = invalidSituation;
+                canAdd = situation.isPositionOrAltitudeNull();
                 if (CBuildConfig::isLocalDeveloperDebugBuild())
                 {
-                    BLACK_VERIFY_X(invalidSituation, Q_FUNC_INFO, "Expect valid situation");
+                    BLACK_VERIFY_X(canAdd, Q_FUNC_INFO, "Expect valid situation");
                     CLogMessage(this).warning(u"Invalid situation for '%1'") << callsign;
                 }
             }
diff --git a/src/swiftguistandard/swiftguistdmenus.cpp b/src/swiftguistandard/swiftguistdmenus.cpp
index 9086c82aa..3a492a192 100644
--- a/src/swiftguistandard/swiftguistdmenus.cpp
+++ b/src/swiftguistandard/swiftguistdmenus.cpp
@@ -156,9 +156,9 @@ void SwiftGuiStd::initMenus()
 
     if (CBuildConfig::isLocalDeveloperDebugBuild() && ui->menu_File && ui->menu_File->actions().size() > 5)
     {
-        QAction *a = new QAction(CIcons::swift16(), "Copy XSwiftBus dialog");
-        ui->menu_File->insertAction(ui->menu_File->actions().at(5), a);
-        c = connect(a, &QAction::triggered, this, [ = ]
+        QAction *act = new QAction(CIcons::swift16(), "Copy XSwiftBus dialog");
+        ui->menu_File->insertAction(ui->menu_File->actions().at(5), act);
+        c = connect(act, &QAction::triggered, this, [ = ]
         {
             this->copyXSwiftBusDialog(false);
         }, Qt::QueuedConnection);
diff --git a/src/xswiftbus/traffic.cpp b/src/xswiftbus/traffic.cpp
index 538648428..7f4139b80 100644
--- a/src/xswiftbus/traffic.cpp
+++ b/src/xswiftbus/traffic.cpp
@@ -980,6 +980,7 @@ namespace XSwiftBus
             // fixme: In a future update, change the orbit only while right mouse button is pressed.
             XPLMGetScreenSize(&w, &h);
             XPLMGetMouseLocation(&x, &y);
+            // cppcheck-suppress knownConditionTrueFalse
             if (DEBUG) { DEBUG_LOG("Follow aircraft coordinates w,h,x,y: " + std::to_string(w) + " " + std::to_string(h) + " " + std::to_string(x) + " " + std::to_string(y)); }
             if (traffic->m_lastMouseX == x && traffic->m_lastMouseY == y && traffic->m_lastMouseX >= 0 && traffic->m_lastMouseY >= 0)
             {
@@ -1104,12 +1105,13 @@ namespace XSwiftBus
             return 0;
         }
 
-        // Return 1 to indicate we want to keep controlling the camera.
+        // cppcheck-suppress knownConditionTrueFalse
         if (DEBUG)
         {
             DEBUG_LOG("Camera: " + pos2String(cameraPosition));
             DEBUG_LOG("Follow aircraft " + traffic->m_followPlaneViewCallsign + " " + modelName);
         }
+        // Return 1 to indicate we want to keep controlling the camera.
         return 1;
     }
 
diff --git a/tests/blackmisc/simulation/testinterpolatorlinear/testinterpolatorlinear.cpp b/tests/blackmisc/simulation/testinterpolatorlinear/testinterpolatorlinear.cpp
index c5ce58aab..3e159867b 100644
--- a/tests/blackmisc/simulation/testinterpolatorlinear/testinterpolatorlinear.cpp
+++ b/tests/blackmisc/simulation/testinterpolatorlinear/testinterpolatorlinear.cpp
@@ -192,12 +192,11 @@ namespace BlackMiscTest
         const int steps = 10;
         const double tfStep = 1.0 / steps;
 
-        double timeFraction = 0;
         double lastDeg = 0;
 
         for (int i = 0; i < steps; i++)
         {
-            timeFraction = tfStep * i;
+            double timeFraction = tfStep * i;
             pbh.setTimeFraction(timeFraction);
             const CHeading heading = pbh.getHeading();
             const double h = heading.value(CAngleUnit::deg());
@@ -215,7 +214,7 @@ namespace BlackMiscTest
 
         for (int i = 0; i < steps; i++)
         {
-            timeFraction = tfStep * i;
+            double timeFraction = tfStep * i;
             pbh.setTimeFraction(timeFraction);
             const CHeading heading = pbh.getHeading();
             const double h = heading.value(CAngleUnit::deg());
@@ -233,7 +232,7 @@ namespace BlackMiscTest
 
         for (int i = 0; i < steps; i++)
         {
-            timeFraction = tfStep * i;
+            double timeFraction = tfStep * i;
             pbh.setTimeFraction(timeFraction);
             const CHeading heading = pbh.getHeading();
             const double h = CAngle::normalizeDegrees360(heading.value(CAngleUnit::deg()));
@@ -253,7 +252,7 @@ namespace BlackMiscTest
 
         for (int i = 0; i < steps; i++)
         {
-            timeFraction = tfStep * i;
+            double timeFraction = tfStep * i;
             pbh.setTimeFraction(timeFraction);
             const CAngle bank = pbh.getBank();
             const double b = bank.value(CAngleUnit::deg());
@@ -271,7 +270,7 @@ namespace BlackMiscTest
 
         for (int i = 0; i < steps; i++)
         {
-            timeFraction = tfStep * i;
+            double timeFraction = tfStep * i;
             pbh.setTimeFraction(timeFraction);
             const CAngle bank = pbh.getBank();
             const double b = CAngle::normalizeDegrees360(bank.value(CAngleUnit::deg()));
@@ -291,7 +290,7 @@ namespace BlackMiscTest
 
         for (int i = 0; i < steps; i++)
         {
-            timeFraction = tfStep * i;
+            double timeFraction = tfStep * i;
             pbh.setTimeFraction(timeFraction);
             const CAngle pitch = pbh.getPitch();
             const double p = pitch.value(CAngleUnit::deg());
@@ -311,7 +310,7 @@ namespace BlackMiscTest
 
         for (int i = 0; i < steps; i++)
         {
-            timeFraction = tfStep * i;
+            double timeFraction = tfStep * i;
             pbh.setTimeFraction(timeFraction);
             const CAngle pitch = pbh.getPitch();
             const double p = pitch.value(CAngleUnit::deg());
diff --git a/tests/blackmisc/testcontainers/testcontainers.cpp b/tests/blackmisc/testcontainers/testcontainers.cpp
index 4f8e06436..f27256480 100644
--- a/tests/blackmisc/testcontainers/testcontainers.cpp
+++ b/tests/blackmisc/testcontainers/testcontainers.cpp
@@ -375,7 +375,6 @@ namespace BlackMiscTest
         qint64 ts = 1000000;
         int no = 10;
         const int max = 6;
-        int dt = 0;
 
         for (int i = 0; i < no; ++i)
         {
@@ -386,16 +385,15 @@ namespace BlackMiscTest
 
             if (CMathUtils::randomBool())
             {
-                dt = CMathUtils::randomInteger(4500, 5500);
+                ts += CMathUtils::randomInteger(4500, 5500);
                 s.setTimeOffsetMs(6000);
             }
             else
             {
-                dt = CMathUtils::randomInteger(900, 1100);
+                ts += CMathUtils::randomInteger(900, 1100);
                 s.setTimeOffsetMs(2000);
             }
 
-            ts += dt;
             situations.push_frontKeepLatestFirstAdjustOffset(s, true, max);
 
             QVERIFY2(situations.size() <= max, "Wrong size");