diff --git a/src/blackmisc/avatcstation.cpp b/src/blackmisc/avatcstation.cpp
index efa9becfe..aa190db2d 100644
--- a/src/blackmisc/avatcstation.cpp
+++ b/src/blackmisc/avatcstation.cpp
@@ -57,6 +57,31 @@ namespace BlackMisc
                 this->m_controller.setCallsign(callsign);
         }
 
+        /*
+         * METAR
+         */
+        bool CAtcStation::hasMetar() const
+        {
+            return this->m_metar.hasMessage();
+        }
+
+        /*
+         * Suffix
+         */
+        QString CAtcStation::getCallsignSuffix() const
+        {
+            return m_callsign.getSuffix();
+        }
+
+        /*
+         * Callsign
+         */
+        void CAtcStation::setCallsign(const CCallsign &callsign)
+        {
+            this->m_callsign = callsign;
+            this->m_controller.setCallsign(callsign);
+        }
+
         /*
          * Convert to string
          */
diff --git a/src/blackmisc/avatcstation.h b/src/blackmisc/avatcstation.h
index 01f48a89b..180e018bb 100644
--- a/src/blackmisc/avatcstation.h
+++ b/src/blackmisc/avatcstation.h
@@ -83,10 +83,7 @@ namespace BlackMisc
             }
 
             //! Has METAR?
-            bool hasMetar() const
-            {
-                return this->m_metar.hasMessage();
-            }
+            bool hasMetar() const;
 
             //! Get callsign.
             const CCallsign &getCallsign() const { return m_callsign; }
@@ -94,8 +91,11 @@ namespace BlackMisc
             //! Get callsign as string.
             QString getCallsignAsString() const { return m_callsign.asString(); }
 
+            //! Callsign suffix (e.g. TWR)
+            QString getCallsignSuffix() const;
+
             //! Set callsign
-            void setCallsign(const CCallsign &callsign) { this->m_callsign = callsign; this->m_controller.setCallsign(callsign);}
+            void setCallsign(const CCallsign &callsign);
 
             //! Get controller
             const BlackMisc::Network::CUser &getController() const { return m_controller; }
diff --git a/src/blackmisc/avatcstationlist.cpp b/src/blackmisc/avatcstationlist.cpp
index b0943cd5e..9d6b09032 100644
--- a/src/blackmisc/avatcstationlist.cpp
+++ b/src/blackmisc/avatcstationlist.cpp
@@ -85,6 +85,17 @@ namespace BlackMisc
             });
         }
 
+        /*
+         * Find by suffix
+         */
+        CAtcStationList CAtcStationList::findBySuffix(const QString &suffix) const
+        {
+            CAtcStationList r;
+            if (suffix.isEmpty()) { return r; }
+            r = this->findBy(&CAtcStation::getCallsignSuffix, suffix);
+            return r;
+        }
+
         /*
          * Distances to own plane
          */
@@ -104,6 +115,28 @@ namespace BlackMisc
             return this->findBy(Predicates::MemberValid(&CAtcStation::getController)).transform(Predicates::MemberTransform(&CAtcStation::getController));
         }
 
+        /*
+         * Suffixes with count
+         */
+        QMap<QString, int> CAtcStationList::getSuffixes() const
+        {
+            QMap<QString, int> r;
+            for (const CAtcStation &station : (*this))
+            {
+                const QString s = station.getCallsignSuffix();
+                if (s.isEmpty()) { continue; }
+                if (r.contains(s))
+                {
+                    r[s] = r[s] + 1;
+                }
+                else
+                {
+                    r.insert(s, 1);
+                }
+            }
+            return r;
+        }
+
         /*
          * Merge with booking, both (online/booking will be updated)
          */
diff --git a/src/blackmisc/avatcstationlist.h b/src/blackmisc/avatcstationlist.h
index a74d13738..9e7ae0ee1 100644
--- a/src/blackmisc/avatcstationlist.h
+++ b/src/blackmisc/avatcstationlist.h
@@ -48,9 +48,15 @@ namespace BlackMisc
             //! Find 0..n stations tune in frequency of COM unit (with 25kHt channel spacing
             CAtcStationList findIfComUnitTunedIn25KHz(const BlackMisc::Aviation::CComSystem &comUnit) const;
 
+            //! Find 0..n stations matching the suffix (e.g. TWR)
+            CAtcStationList findBySuffix(const QString &suffix) const;
+
             //! All controllers (with valid data)
             BlackMisc::Network::CUserList getControllers() const;
 
+            //! Get all (different suffixes)
+            QMap<QString, int> getSuffixes() const;
+
             //! Update distances to coordinate, usually own aircraft's position
             void calculateDistancesToPlane(const BlackMisc::Geo::CCoordinateGeodetic &position);