diff --git a/src/blackmisc/aviation/atcstation.cpp b/src/blackmisc/aviation/atcstation.cpp
index 12e55b2c6..ee5ca1855 100644
--- a/src/blackmisc/aviation/atcstation.cpp
+++ b/src/blackmisc/aviation/atcstation.cpp
@@ -280,11 +280,6 @@ namespace BlackMisc::Aviation
         return true;
     }
 
-    bool CAtcStation::isComUnitTunedIn25KHz(const CComSystem &comUnit) const
-    {
-        return comUnit.isActiveFrequencyWithin25kHzChannel(this->getFrequency());
-    }
-
     bool CAtcStation::isComUnitTunedInChannelSpacing(const CComSystem &comUnit) const
     {
         return comUnit.isActiveFrequencySameFrequency(this->getFrequency());
diff --git a/src/blackmisc/aviation/atcstation.h b/src/blackmisc/aviation/atcstation.h
index 4d397b01a..3c9baf0c6 100644
--- a/src/blackmisc/aviation/atcstation.h
+++ b/src/blackmisc/aviation/atcstation.h
@@ -197,9 +197,6 @@ namespace BlackMisc::Aviation
         //! Booked now?
         bool isBookedNow() const;
 
-        //! Tuned in within 25KHz channel spacing
-        bool isComUnitTunedIn25KHz(const Aviation::CComSystem &comUnit) const;
-
         //! Tuned in within channel spacing
         bool isComUnitTunedInChannelSpacing(const Aviation::CComSystem &comUnit) const;
 
diff --git a/src/blackmisc/aviation/atcstationlist.cpp b/src/blackmisc/aviation/atcstationlist.cpp
index 34563d00f..939451792 100644
--- a/src/blackmisc/aviation/atcstationlist.cpp
+++ b/src/blackmisc/aviation/atcstationlist.cpp
@@ -29,14 +29,6 @@ namespace BlackMisc::Aviation
         CSequence<CAtcStation>(other)
     { }
 
-    CAtcStationList CAtcStationList::findIfComUnitTunedIn25KHz(const CComSystem &comUnit) const
-    {
-        return this->findBy([&](const CAtcStation & atcStation)
-        {
-            return atcStation.isComUnitTunedIn25KHz(comUnit);
-        });
-    }
-
     CAtcStationList CAtcStationList::findIfComUnitTunedInChannelSpacing(const CComSystem &comUnit) const
     {
         return this->findBy([&](const CAtcStation & atcStation)
diff --git a/src/blackmisc/aviation/atcstationlist.h b/src/blackmisc/aviation/atcstationlist.h
index 3fbb1c1f1..5713b399b 100644
--- a/src/blackmisc/aviation/atcstationlist.h
+++ b/src/blackmisc/aviation/atcstationlist.h
@@ -45,9 +45,6 @@ namespace BlackMisc::Aviation
         //! Construct from a base class object.
         CAtcStationList(const CSequence<CAtcStation> &other);
 
-        //! Find 0..n stations tuned in frequency of COM unit (with 25kHz channel spacing)
-        CAtcStationList findIfComUnitTunedIn25KHz(const CComSystem &comUnit) const;
-
         //! Find 0..n stations tuned in frequency of COM unit (with channel spacing)
         CAtcStationList findIfComUnitTunedInChannelSpacing(const CComSystem &comUnit) const;
 
diff --git a/src/blackmisc/simulation/simulatedaircraft.cpp b/src/blackmisc/simulation/simulatedaircraft.cpp
index da68b7e63..0dfc26a26 100644
--- a/src/blackmisc/simulation/simulatedaircraft.cpp
+++ b/src/blackmisc/simulation/simulatedaircraft.cpp
@@ -563,18 +563,6 @@ namespace BlackMisc::Simulation
         m_pilot.setCallsign(callsign);
     }
 
-    bool CSimulatedAircraft::isActiveFrequencyWithin8_33kHzChannel(const CFrequency &comFrequency) const
-    {
-        return m_com1system.isActiveFrequencyWithin8_33kHzChannel(comFrequency) ||
-                m_com2system.isActiveFrequencyWithin8_33kHzChannel(comFrequency);
-    }
-
-    bool CSimulatedAircraft::isActiveFrequencyWithin25kHzChannel(const CFrequency &comFrequency) const
-    {
-        return m_com1system.isActiveFrequencyWithin25kHzChannel(comFrequency) ||
-                m_com2system.isActiveFrequencyWithin25kHzChannel(comFrequency);
-    }
-
     bool CSimulatedAircraft::isActiveFrequencyWithinChannelSpacing(const CFrequency &comFrequency) const
     {
         return m_com1system.isActiveFrequencySameFrequency(comFrequency) ||
diff --git a/src/blackmisc/simulation/simulatedaircraft.h b/src/blackmisc/simulation/simulatedaircraft.h
index 5eb6f6a4e..0ed3dbd04 100644
--- a/src/blackmisc/simulation/simulatedaircraft.h
+++ b/src/blackmisc/simulation/simulatedaircraft.h
@@ -290,12 +290,6 @@ namespace BlackMisc
             //! Identical COM system?
             bool hasSameComData(const Aviation::CComSystem &com1, const Aviation::CComSystem &com2, const Aviation::CTransponder &transponder);
 
-            //! Is any (COM1/2) active frequency within 8.3383kHz channel?
-            bool isActiveFrequencyWithin8_33kHzChannel(const PhysicalQuantities::CFrequency &comFrequency) const;
-
-            //! Is any (COM1/2) active frequency within 25kHz channel?
-            bool isActiveFrequencyWithin25kHzChannel(const PhysicalQuantities::CFrequency &comFrequency) const;
-
             //! Is any (COM1/2) active frequency within the COM units channel spacing?
             bool isActiveFrequencyWithinChannelSpacing(const PhysicalQuantities::CFrequency &comFrequency) const;