diff --git a/src/blackmisc/aviation/callsignobjectlist.h b/src/blackmisc/aviation/callsignobjectlist.h
index 5c53e8d1f..1049932e2 100644
--- a/src/blackmisc/aviation/callsignobjectlist.h
+++ b/src/blackmisc/aviation/callsignobjectlist.h
@@ -22,6 +22,31 @@
 
 namespace BlackMisc
 {
+
+    namespace Aviation
+    {
+        class CAircraftSituation;
+        class CAircraftSituationList;
+        class CAircraftParts;
+        class CAircraftPartsList;
+        class CAircraft;
+        class CAircraftList;
+        class CAtcStation;
+        class CAtcStationList;
+    }
+
+    namespace Simulation
+    {
+        class CSimulatedAircraft;
+        class CSimulatedAircraftList;
+    }
+
+    namespace Network
+    {
+        class CClient;
+        class CClientList;
+    }
+
     namespace Aviation
     {
         //! List of objects with callsign.
@@ -83,6 +108,13 @@ namespace BlackMisc
             CONTAINER &container();
         };
 
+        extern template class ICallsignObjectList<BlackMisc::Aviation::CAtcStation, BlackMisc::Aviation::CAtcStationList>;
+        extern template class ICallsignObjectList<BlackMisc::Aviation::CAircraft, BlackMisc::Aviation::CAircraftList>;
+        extern template class ICallsignObjectList<BlackMisc::Aviation::CAircraftSituation, BlackMisc::Aviation::CAircraftSituationList>;
+        extern template class ICallsignObjectList<BlackMisc::Aviation::CAircraftParts, BlackMisc::Aviation::CAircraftPartsList>;
+        extern template class ICallsignObjectList<BlackMisc::Simulation::CSimulatedAircraft, BlackMisc::Simulation::CSimulatedAircraftList>;
+        extern template class ICallsignObjectList<BlackMisc::Network::CClient, BlackMisc::Network::CClientList>;
+
     } //namespace
 } // namespace
 
diff --git a/src/blackmisc/aviation/modulator.cpp b/src/blackmisc/aviation/modulator.cpp
index 425c6b446..c83ca71ca 100644
--- a/src/blackmisc/aviation/modulator.cpp
+++ b/src/blackmisc/aviation/modulator.cpp
@@ -85,6 +85,18 @@ namespace BlackMisc
             }
         }
 
+        template <class AVIO>
+        AVIO const *CModulator<AVIO>::derived() const
+        {
+            return static_cast<AVIO const *>(this);
+        }
+
+        template <class AVIO>
+        AVIO *CModulator<AVIO>::derived()
+        {
+            return static_cast<AVIO *>(this);
+        }
+
         // see here for the reason of thess forward instantiations
         // http://www.parashift.com/c++-faq/separate-template-class-defn-from-decl.html
         template class CModulator<CComSystem>;
diff --git a/src/blackmisc/aviation/modulator.h b/src/blackmisc/aviation/modulator.h
index 93d230064..9956c435a 100644
--- a/src/blackmisc/aviation/modulator.h
+++ b/src/blackmisc/aviation/modulator.h
@@ -22,6 +22,10 @@ namespace BlackMisc
     namespace Aviation
     {
 
+        class CComSystem;
+        class CNavSystem;
+        class CAdfSystem;
+
         //! Base class for COM, NAV, Squawk units.
         template <class AVIO> class CModulator : public CValueObject<CModulator<AVIO>, CAvionicsBase>
         {
@@ -209,12 +213,16 @@ namespace BlackMisc
             bool m_enabled = true;     //!< is enabled, used e.g. for mute etc.
 
             //! Easy access to derived class (CRTP template parameter)
-            AVIO const *derived() const { return static_cast<AVIO const *>(this); }
+            AVIO const *derived() const;
 
             //! Easy access to derived class (CRTP template parameter)
-            AVIO *derived() { return static_cast<AVIO *>(this); }
+            AVIO *derived();
         };
 
+        extern template class CModulator<CComSystem>;
+        extern template class CModulator<CNavSystem>;
+        extern template class CModulator<CAdfSystem>;
+
     }
 }
 
diff --git a/src/blackmisc/blackmiscfreefunctions.cpp b/src/blackmisc/blackmiscfreefunctions.cpp
index 9d64a979c..4280e0604 100644
--- a/src/blackmisc/blackmiscfreefunctions.cpp
+++ b/src/blackmisc/blackmiscfreefunctions.cpp
@@ -244,26 +244,6 @@ QVariant BlackMisc::complexQtTypeFromDbusArgument(const QDBusArgument &argument,
     return QVariant(); // suppress compiler warning
 }
 
-template<class K, class V> QString BlackMisc::qmapToString(const QMap<K, V> &map)
-{
-    QString s;
-    const QString kv("%1: %2 ");
-    QMapIterator<K, V> i(map);
-    while (i.hasNext())
-    {
-        i.next();
-        s.append(
-            kv.arg(i.key()).arg(i.value())
-        );
-    }
-    return s.trimmed();
-}
-
-// forward declare: http://www.parashift.com/c++-faq-lite/separate-template-fn-defn-from-decl.html
-template QString BlackMisc::qmapToString<QString, int>(const QMap<QString, int> &);
-template QString BlackMisc::qmapToString<QString, QString>(const QMap<QString, QString> &);
-template QString BlackMisc::qmapToString<QString, double>(const QMap<QString, double> &);
-
 #ifdef Q_CC_MSVC
 #include <crtdbg.h>
 
diff --git a/src/blackmisc/blackmiscfreefunctions.h b/src/blackmisc/blackmiscfreefunctions.h
index 972421764..a75b6847b 100644
--- a/src/blackmisc/blackmiscfreefunctions.h
+++ b/src/blackmisc/blackmiscfreefunctions.h
@@ -169,7 +169,20 @@ namespace BlackMisc
     size_t heapSizeOf(const QMetaObject &objectType);
 
     //! A map converted to string
-    template<class K, class V> QString qmapToString(const QMap<K, V> &map);
+    template<class K, class V> QString qmapToString(const QMap<K, V> &map)
+    {
+        QString s;
+        const QString kv("%1: %2 ");
+        QMapIterator<K, V> i(map);
+        while (i.hasNext())
+        {
+            i.next();
+            s.append(
+                kv.arg(i.key()).arg(i.value())
+            );
+        }
+        return s.trimmed();
+    }
 
     //! Bool to on/off
     QString boolToOnOff(bool v, bool  i18n = false);
diff --git a/src/blackmisc/geo/earthangle.h b/src/blackmisc/geo/earthangle.h
index 18d3a367e..bbad9ef85 100644
--- a/src/blackmisc/geo/earthangle.h
+++ b/src/blackmisc/geo/earthangle.h
@@ -26,6 +26,10 @@ namespace BlackMisc
 
     namespace Geo
     {
+
+        class CLatitude;
+        class CLongitude;
+
         /*!
          * Base class for latitude / longitude
          */
@@ -134,6 +138,10 @@ namespace BlackMisc
             //! Easy access to derived class (CRTP template parameter)
             LATorLON *derived() { return static_cast<LATorLON *>(this); }
         };
+
+        extern template class CEarthAngle<CLatitude>;
+        extern template class CEarthAngle<CLongitude>;
+
     }
 }
 
diff --git a/src/blackmisc/geo/geoobjectlist.h b/src/blackmisc/geo/geoobjectlist.h
index 778b72df2..1df2aabc1 100644
--- a/src/blackmisc/geo/geoobjectlist.h
+++ b/src/blackmisc/geo/geoobjectlist.h
@@ -18,6 +18,22 @@
 
 namespace BlackMisc
 {
+    namespace Aviation
+    {
+        class CAtcStation;
+        class CAtcStationList;
+        class CAircraft;
+        class CAircraftList;
+        class CAirport;
+        class CAirportList;
+    }
+
+    namespace Simulation
+    {
+        class CSimulatedAircraft;
+        class CSimulatedAircraftList;
+    }
+
     namespace Geo
     {
         //! List of objects with geo coordinates.
@@ -45,6 +61,11 @@ namespace BlackMisc
             CONTAINER &container();
         };
 
+        extern template class IGeoObjectList<BlackMisc::Aviation::CAtcStation, BlackMisc::Aviation::CAtcStationList>;
+        extern template class IGeoObjectList<BlackMisc::Aviation::CAircraft, BlackMisc::Aviation::CAircraftList>;
+        extern template class IGeoObjectList<BlackMisc::Aviation::CAirport, BlackMisc::Aviation::CAirportList>;
+        extern template class IGeoObjectList<BlackMisc::Simulation::CSimulatedAircraft, BlackMisc::Simulation::CSimulatedAircraftList>;
+
         //! List of objects with geo coordinates.
         template<class OBJ, class CONTAINER>
         class IGeoObjectWithRelativePositionList : public IGeoObjectList<OBJ, CONTAINER>
@@ -71,6 +92,11 @@ namespace BlackMisc
 
         };
 
+        extern template class IGeoObjectWithRelativePositionList<BlackMisc::Aviation::CAtcStation, BlackMisc::Aviation::CAtcStationList>;
+        extern template class IGeoObjectWithRelativePositionList<BlackMisc::Aviation::CAircraft, BlackMisc::Aviation::CAircraftList>;
+        extern template class IGeoObjectWithRelativePositionList<BlackMisc::Aviation::CAirport, BlackMisc::Aviation::CAirportList>;
+        extern template class IGeoObjectWithRelativePositionList<BlackMisc::Simulation::CSimulatedAircraft, BlackMisc::Simulation::CSimulatedAircraftList>;
+
     } //namespace
 } // namespace
 
diff --git a/src/blackmisc/pq/physicalquantity.cpp b/src/blackmisc/pq/physicalquantity.cpp
index 16f9388ae..bd5ccadaf 100644
--- a/src/blackmisc/pq/physicalquantity.cpp
+++ b/src/blackmisc/pq/physicalquantity.cpp
@@ -212,6 +212,16 @@ namespace BlackMisc
             this->m_value = json.value("value").toDouble();
         }
 
+        template <class MU, class PQ> void CPhysicalQuantity<MU, PQ>::parseFromString(const QString &value, CPqString::SeparatorMode mode)
+        {
+            *this = CPqString::parse<PQ>(value, mode);
+        }
+
+        template <class MU, class PQ> void CPhysicalQuantity<MU, PQ>::parseFromString(const QString &value)
+        {
+            *this = CPqString::parse<PQ>(value, CPqString::SeparatorsCLocale);
+        }
+
         template <class MU, class PQ> CVariant CPhysicalQuantity<MU, PQ>::propertyByIndex(const CPropertyIndex &index) const
         {
             if (index.isMyself()) { return this->toCVariant(); }
diff --git a/src/blackmisc/pq/physicalquantity.h b/src/blackmisc/pq/physicalquantity.h
index e2c9dc035..ec095027b 100644
--- a/src/blackmisc/pq/physicalquantity.h
+++ b/src/blackmisc/pq/physicalquantity.h
@@ -26,7 +26,19 @@
 
 namespace BlackMisc
 {
-    namespace PhysicalQuantities { template <class, class> class CPhysicalQuantity; }
+    namespace PhysicalQuantities
+    {
+        template <class, class> class CPhysicalQuantity;
+        class CLength;
+        class CPressure;
+        class CFrequency;
+        class CMass;
+        class CTemperature;
+        class CSpeed;
+        class CTime;
+        class CPressure;
+        class CAcceleration;
+    }
 
     //! \private
     template <class MU, class PQ> struct CValueObjectPolicy<PhysicalQuantities::CPhysicalQuantity<MU, PQ>> : public CValueObjectPolicy<>
@@ -227,16 +239,10 @@ namespace BlackMisc
             virtual void convertFromJson(const QJsonObject &json) override;
 
             //! Parse to string, with specified separator
-            virtual void parseFromString(const QString &value, CPqString::SeparatorMode mode)
-            {
-                *this = CPqString::parse<PQ>(value, mode);
-            }
+            virtual void parseFromString(const QString &value, CPqString::SeparatorMode mode);
 
             //! \copydoc CValueObject::parseFromString
-            virtual void parseFromString(const QString &value) override
-            {
-                *this = CPqString::parse<PQ>(value, CPqString::SeparatorsCLocale);
-            }
+            virtual void parseFromString(const QString &value) override;
 
             //! \copydoc CValueObject::propertyByIndex
             virtual CVariant propertyByIndex(const BlackMisc::CPropertyIndex &index) const override;
@@ -278,6 +284,17 @@ namespace BlackMisc
             //! Easy access to derived class (CRTP template parameter)
             PQ *derived() { return static_cast<PQ *>(this); }
         };
+
+        extern template class CPhysicalQuantity<CLengthUnit, CLength>;
+        extern template class CPhysicalQuantity<CPressureUnit, CPressure>;
+        extern template class CPhysicalQuantity<CFrequencyUnit, CFrequency>;
+        extern template class CPhysicalQuantity<CMassUnit, CMass>;
+        extern template class CPhysicalQuantity<CTemperatureUnit, CTemperature>;
+        extern template class CPhysicalQuantity<CSpeedUnit, CSpeed>;
+        extern template class CPhysicalQuantity<CAngleUnit, CAngle>;
+        extern template class CPhysicalQuantity<CTimeUnit, CTime>;
+        extern template class CPhysicalQuantity<CAccelerationUnit, CAcceleration>;
+
     }
 }
 
diff --git a/src/blackmisc/timestampobjectlist.h b/src/blackmisc/timestampobjectlist.h
index b0dc60190..e3134606f 100644
--- a/src/blackmisc/timestampobjectlist.h
+++ b/src/blackmisc/timestampobjectlist.h
@@ -19,6 +19,24 @@
 
 namespace BlackMisc
 {
+    namespace Aviation
+    {
+        class CAircraftSituation;
+        class CAircraftSituationList;
+        class CAircraftParts;
+        class CAircraftPartsList;
+    }
+
+    namespace Network
+    {
+        class CTextMessage;
+        class CTextMessageList;
+    }
+
+    class CStatusMessage;
+    class CStatusMessageList;
+
+
     //! List of objects with timestamp.
     //! Such objects should implement \sa ITimestampBased
     template<class OBJ, class CONTAINER>
@@ -83,6 +101,11 @@ namespace BlackMisc
         CONTAINER &container();
     };
 
+    extern template class ITimestampObjectList<BlackMisc::Aviation::CAircraftSituation, BlackMisc::Aviation::CAircraftSituationList>;
+    extern template class ITimestampObjectList<BlackMisc::Aviation::CAircraftParts, BlackMisc::Aviation::CAircraftPartsList>;
+    extern template class ITimestampObjectList<BlackMisc::Network::CTextMessage, BlackMisc::Network::CTextMessageList>;
+    extern template class ITimestampObjectList<BlackMisc::CStatusMessage, BlackMisc::CStatusMessageList>;
+
 } //namespace
 
 #endif //guard