diff --git a/libraries/RC_Channel/RC_Channel.cpp b/libraries/RC_Channel/RC_Channel.cpp
index 553274705a..18eaf38077 100644
--- a/libraries/RC_Channel/RC_Channel.cpp
+++ b/libraries/RC_Channel/RC_Channel.cpp
@@ -92,9 +92,9 @@ const AP_Param::GroupInfo RC_Channel::var_info[] = {
     // @Param: OPTION
     // @DisplayName: RC input option
     // @Description: Function assigned to this RC channel
-    // @Values{Copter}: 0:Do Nothing, 2:Flip, 3:Simple Mode, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 10:RangeFinder, 11:Fence, 13:Super Simple Mode, 14:Acro Trainer, 15:Sprayer, 16:Auto, 17:AutoTune, 18:Land, 19:Gripper, 21:Parachute Enable, 22:Parachute Release, 23:Parachute 3pos, 24:Auto Mission Reset, 25:AttCon Feed Forward, 26:AttCon Accel Limits, 27:Retract Mount, 28:Relay On/Off, 29:Landing Gear, 30:Lost Copter Sound, 31:Motor Emergency Stop, 32:Motor Interlock, 33:Brake, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 37:Throw, 38:ADSB Avoidance En, 39:PrecLoiter, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 43:InvertedFlight, 46:RC Override Enable, 47:User Function 1, 48:User Function 2, 49:User Function 3, 52:Acro, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 60:ZigZag, 61:ZigZag SaveWP, 62:Compass Learn, 65:GPS Disable, 66:Relay5, 67:Relay6, 68:Stabilize, 69:PosHold, 70:AltHold, 71:FlowHold, 72:Circle, 73:Drift, 76:Standby Mode, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 83:ZigZag Auto, 84:Air Mode, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle
-    // @Values{Rover}: 0:Do Nothing, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 11:Fence, 16:Auto, 19:Gripper, 24:Auto Mission Reset, 28:Relay On/Off, 30:Lost Rover Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 46:RC Override Enable, 50:LearnCruise, 51:Manual, 52:Acro, 53:Steering, 54:Hold, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 59:Simple Mode, 62:Compass Learn, 63:Sailboat Tack, 65:GPS Disable, 66:Relay5, 67:Relay6, 74:Sailboat motoring 3pos, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 100:KillIMU1, 101:KillIMU2, 207:MainSail, 102:Camera Mode Toggle
-    // @Values{Plane}: 0:Do Nothing, 4:ModeRTL, 9:Camera Trigger, 16:ModeAuto, 24:Auto Mission Reset, 28:Relay On/Off, 29:Landing Gear, 34:Relay2 On/Off, 30:Lost Plane Sound, 31:Motor Emergency Stop, 35:Relay3 On/Off, 36:Relay4 On/Off, 38:ADSB Avoidance En, 41:ArmDisarm, 43:InvertedFlight, 46:RC Override Enable, 51:ModeManual, 55:ModeGuided, 56:ModeLoiter, 58:Clear Waypoints, 62:Compass Learn, 64:Reverse Throttle, 65:GPS Disable, 66:Relay5, 67:Relay6, 72:ModeCircle, 77:ModeTakeoff, 78:RunCam Control, 79:RunCam OSD Control, 81:Disarm, 82:QAssist 3pos, 100:KillIMU1, 101:KillIMU2, 208:Flap, 102:Camera Mode Toggle
+    // @Values{Copter}: 0:Do Nothing, 2:Flip, 3:Simple Mode, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 10:RangeFinder, 11:Fence, 13:Super Simple Mode, 14:Acro Trainer, 15:Sprayer, 16:Auto, 17:AutoTune, 18:Land, 19:Gripper, 21:Parachute Enable, 22:Parachute Release, 23:Parachute 3pos, 24:Auto Mission Reset, 25:AttCon Feed Forward, 26:AttCon Accel Limits, 27:Retract Mount, 28:Relay On/Off, 29:Landing Gear, 30:Lost Copter Sound, 31:Motor Emergency Stop, 32:Motor Interlock, 33:Brake, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 37:Throw, 38:ADSB Avoidance En, 39:PrecLoiter, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 43:InvertedFlight, 46:RC Override Enable, 47:User Function 1, 48:User Function 2, 49:User Function 3, 52:Acro, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 60:ZigZag, 61:ZigZag SaveWP, 62:Compass Learn, 65:GPS Disable, 66:Relay5, 67:Relay6, 68:Stabilize, 69:PosHold, 70:AltHold, 71:FlowHold, 72:Circle, 73:Drift, 76:Standby Mode, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 83:ZigZag Auto, 84:Air Mode, 100:KillIMU1, 101:KillIMU2, 102:Camera Mode Toggle, 105:GPS Disable Yaw
+    // @Values{Rover}: 0:Do Nothing, 4:RTL, 5:Save Trim, 7:Save WP, 9:Camera Trigger, 11:Fence, 16:Auto, 19:Gripper, 24:Auto Mission Reset, 28:Relay On/Off, 30:Lost Rover Sound, 31:Motor Emergency Stop, 34:Relay2 On/Off, 35:Relay3 On/Off, 36:Relay4 On/Off, 40:Proximity Avoidance, 41:ArmDisarm, 42:SmartRTL, 46:RC Override Enable, 50:LearnCruise, 51:Manual, 52:Acro, 53:Steering, 54:Hold, 55:Guided, 56:Loiter, 57:Follow, 58:Clear Waypoints, 59:Simple Mode, 62:Compass Learn, 63:Sailboat Tack, 65:GPS Disable, 66:Relay5, 67:Relay6, 74:Sailboat motoring 3pos, 78:RunCam Control, 79:RunCam OSD Control, 80:Viso Align, 81:Disarm, 100:KillIMU1, 101:KillIMU2, 207:MainSail, 102:Camera Mode Toggle, 105:GPS Disable Yaw
+    // @Values{Plane}: 0:Do Nothing, 4:ModeRTL, 9:Camera Trigger, 16:ModeAuto, 24:Auto Mission Reset, 28:Relay On/Off, 29:Landing Gear, 34:Relay2 On/Off, 30:Lost Plane Sound, 31:Motor Emergency Stop, 35:Relay3 On/Off, 36:Relay4 On/Off, 38:ADSB Avoidance En, 41:ArmDisarm, 43:InvertedFlight, 46:RC Override Enable, 51:ModeManual, 55:ModeGuided, 56:ModeLoiter, 58:Clear Waypoints, 62:Compass Learn, 64:Reverse Throttle, 65:GPS Disable, 66:Relay5, 67:Relay6, 72:ModeCircle, 77:ModeTakeoff, 78:RunCam Control, 79:RunCam OSD Control, 81:Disarm, 82:QAssist 3pos, 100:KillIMU1, 101:KillIMU2, 208:Flap, 102:Camera Mode Toggle, 105:GPS Disable Yaw
     // @User: Standard
     AP_GROUPINFO_FRAME("OPTION",  6, RC_Channel, option, 0, AP_PARAM_FRAME_COPTER|AP_PARAM_FRAME_ROVER|AP_PARAM_FRAME_PLANE),
 
@@ -473,6 +473,7 @@ void RC_Channel::init_aux_function(const aux_func_t ch_option, const AuxSwitchPo
     case AUX_FUNC::AVOID_PROXIMITY:
     case AUX_FUNC::FENCE:
     case AUX_FUNC::GPS_DISABLE:
+    case AUX_FUNC::GPS_DISABLE_YAW:
     case AUX_FUNC::GRIPPER:
     case AUX_FUNC::KILL_IMU1:
     case AUX_FUNC::KILL_IMU2:
@@ -522,6 +523,7 @@ const RC_Channel::LookupTable RC_Channel::lookuptable[] = {
     { AUX_FUNC::COMPASS_LEARN,"CompassLearn"},
     { AUX_FUNC::SAILBOAT_TACK,"SailboatTack"},
     { AUX_FUNC::GPS_DISABLE,"GPSDisable"},
+    { AUX_FUNC::GPS_DISABLE_YAW,"GPSDisableYaw"},
     { AUX_FUNC::RELAY5,"Relay5"},
     { AUX_FUNC::RELAY6,"Relay6"},
     { AUX_FUNC::SAILBOAT_MOTOR_3POS,"SailboatMotor"},
@@ -927,6 +929,10 @@ void RC_Channel::do_aux_function(const aux_func_t ch_option, const AuxSwitchPos
         AP::gps().force_disable(ch_flag == AuxSwitchPos::HIGH);
         break;
 
+    case AUX_FUNC::GPS_DISABLE_YAW:
+        AP::gps().set_force_disable_yaw(ch_flag == AuxSwitchPos::HIGH);
+        break;
+
     case AUX_FUNC::MOTOR_ESTOP:
         switch (ch_flag) {
         case AuxSwitchPos::HIGH: {
diff --git a/libraries/RC_Channel/RC_Channel.h b/libraries/RC_Channel/RC_Channel.h
index ffb6c92eb7..8ce557f60f 100644
--- a/libraries/RC_Channel/RC_Channel.h
+++ b/libraries/RC_Channel/RC_Channel.h
@@ -187,6 +187,7 @@ public:
         CAM_MODE_TOGGLE =    102, // Momentary switch to cycle camera modes
         EKF_LANE_SWITCH =    103, // trigger lane switch attempt
         EKF_YAW_RESET =      104, // trigger yaw reset attempt
+        GPS_DISABLE_YAW =    105, // disable GPS yaw for testing
         // if you add something here, make sure to update the documentation of the parameter in RC_Channel.cpp!
         // also, if you add an option >255, you will need to fix duplicate_options_exist