diff --git a/src/AIModel/submodel.hxx b/src/AIModel/submodel.hxx
index 4557ffc7b..b368f06f5 100644
--- a/src/AIModel/submodel.hxx
+++ b/src/AIModel/submodel.hxx
@@ -104,6 +104,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "submodel-mgr"; }
+
     void load();
 
 private:
diff --git a/src/ATC/atc_mgr.hxx b/src/ATC/atc_mgr.hxx
index fb1d50b5d..aa058b43d 100644
--- a/src/ATC/atc_mgr.hxx
+++ b/src/ATC/atc_mgr.hxx
@@ -57,6 +57,9 @@ public:
     void shutdown() override;
     void update(double time) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "ATC"; }
+
     void addController(FGATCController *controller);
     void removeController(FGATCController* controller);
 };
diff --git a/src/Aircraft/FlightHistory.hxx b/src/Aircraft/FlightHistory.hxx
index b791cf89d..7a3991cc8 100644
--- a/src/Aircraft/FlightHistory.hxx
+++ b/src/Aircraft/FlightHistory.hxx
@@ -63,6 +63,9 @@ public:
     void shutdown() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "history"; }
+
     PagedPathForHistory_ptr pagedPathForHistory(size_t max_entries, size_t newerThan = 0) const;
     /**
      * retrieve the path, collapsing segments shorter than
diff --git a/src/Autopilot/autopilot.cxx b/src/Autopilot/autopilot.cxx
index 5bc1a00ae..1e5714cfc 100644
--- a/src/Autopilot/autopilot.cxx
+++ b/src/Autopilot/autopilot.cxx
@@ -54,6 +54,9 @@ public:
         inner = simgear::StateMachine::createFromPlist(&cfg, &props_root);
     }
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "state-machine"; }
+
     virtual bool configure( const std::string & nodeName, SGPropertyNode_ptr config) {
         return false;
     }
diff --git a/src/Autopilot/autopilot.hxx b/src/Autopilot/autopilot.hxx
index fa6bf0945..7100f7a99 100644
--- a/src/Autopilot/autopilot.hxx
+++ b/src/Autopilot/autopilot.hxx
@@ -45,6 +45,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "autopilot"; }
+
     void set_serviceable( bool value ) { _serviceable = value; }
     bool is_serviceable() const { return _serviceable; }
 
diff --git a/src/Autopilot/autopilotgroup.cxx b/src/Autopilot/autopilotgroup.cxx
index b41ee4377..d56d1d88a 100644
--- a/src/Autopilot/autopilotgroup.cxx
+++ b/src/Autopilot/autopilotgroup.cxx
@@ -53,6 +53,9 @@ public:
     InitStatus incrementalInit() override;
     void reinit() override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "xml-autopilot-group"; }
+
     virtual void addAutopilot( const std::string& name,
                                SGPropertyNode_ptr apNode,
                                SGPropertyNode_ptr config );
diff --git a/src/Autopilot/autopilotgroup.hxx b/src/Autopilot/autopilotgroup.hxx
index 56ea4fc79..fd6875906 100644
--- a/src/Autopilot/autopilotgroup.hxx
+++ b/src/Autopilot/autopilotgroup.hxx
@@ -31,6 +31,9 @@
 class FGXMLAutopilotGroup : public SGSubsystemGroup
 {
 public:
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "xml-rules"; }
+
     static FGXMLAutopilotGroup * createInstance(const std::string& nodeName);
 
     void addAutopilotFromFile( const std::string & name, SGPropertyNode_ptr apNode, const char * path );
diff --git a/src/Autopilot/digitalfilter.hxx b/src/Autopilot/digitalfilter.hxx
index 6a497d35c..c1028e53b 100644
--- a/src/Autopilot/digitalfilter.hxx
+++ b/src/Autopilot/digitalfilter.hxx
@@ -62,6 +62,9 @@ public:
     DigitalFilter();
     ~DigitalFilter();
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "filter"; }
+
     virtual bool configure( SGPropertyNode& prop_root,
                             SGPropertyNode& cfg );
 };
diff --git a/src/Autopilot/flipflop.hxx b/src/Autopilot/flipflop.hxx
index 8c4d73667..214ebd4e4 100644
--- a/src/Autopilot/flipflop.hxx
+++ b/src/Autopilot/flipflop.hxx
@@ -66,6 +66,8 @@ public:
 class FlipFlop : public Logic
 {
 public:
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "flipflop"; }
 
 protected:
     /**
diff --git a/src/Autopilot/logic.hxx b/src/Autopilot/logic.hxx
index 28407445b..aec79dbe5 100644
--- a/src/Autopilot/logic.hxx
+++ b/src/Autopilot/logic.hxx
@@ -39,6 +39,9 @@ public:
     void set_output( bool value );
     bool get_output() const;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "logic"; }
+
 protected:
     void update( bool firstTime, double dt );
 };
diff --git a/src/Autopilot/pidcontroller.hxx b/src/Autopilot/pidcontroller.hxx
index 2dce7cfd4..5481423ab 100644
--- a/src/Autopilot/pidcontroller.hxx
+++ b/src/Autopilot/pidcontroller.hxx
@@ -70,6 +70,9 @@ public:
     PIDController();
     ~PIDController() {}
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "pid-controller"; }
+
     void update( bool firstTime, double dt );
 };
 
diff --git a/src/Autopilot/pisimplecontroller.hxx b/src/Autopilot/pisimplecontroller.hxx
index b03e06408..72bcdd802 100644
--- a/src/Autopilot/pisimplecontroller.hxx
+++ b/src/Autopilot/pisimplecontroller.hxx
@@ -57,6 +57,9 @@ public:
     PISimpleController();
     ~PISimpleController() {}
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "pi-simple-controller"; }
+
     void update( bool firstTime, double dt );
 };
 
diff --git a/src/Autopilot/predictor.hxx b/src/Autopilot/predictor.hxx
index 0fe743f69..103192059 100644
--- a/src/Autopilot/predictor.hxx
+++ b/src/Autopilot/predictor.hxx
@@ -61,6 +61,9 @@ public:
     Predictor();
     ~Predictor() {}
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "predict-simple"; }
+
     void update( bool firstTime, double dt );
 };
 
diff --git a/src/Canvas/gui_mgr.hxx b/src/Canvas/gui_mgr.hxx
index 68be7b5eb..f44c3d200 100644
--- a/src/Canvas/gui_mgr.hxx
+++ b/src/Canvas/gui_mgr.hxx
@@ -44,6 +44,9 @@ public:
     void shutdown() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "CanvasGUI"; }
+
     simgear::canvas::WindowPtr createWindow(const std::string& name = "");
 
     /**
diff --git a/src/Cockpit/NavDisplay.hxx b/src/Cockpit/NavDisplay.hxx
index c309e614d..e5625a986 100644
--- a/src/Cockpit/NavDisplay.hxx
+++ b/src/Cockpit/NavDisplay.hxx
@@ -66,6 +66,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "navigation-display"; }
+
     void invalidatePositionedCache()
     {
         _cachedItemsValid = false;
diff --git a/src/Cockpit/agradar.hxx b/src/Cockpit/agradar.hxx
index 184655a6b..f919584d9 100644
--- a/src/Cockpit/agradar.hxx
+++ b/src/Cockpit/agradar.hxx
@@ -41,6 +41,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "air-ground-radar"; }
+
     void setUserPos();
     void setUserVec(double az, double el);
     void update_terrain();
diff --git a/src/Cockpit/cockpitDisplayManager.hxx b/src/Cockpit/cockpitDisplayManager.hxx
index 4ac1419be..d051dac04 100644
--- a/src/Cockpit/cockpitDisplayManager.hxx
+++ b/src/Cockpit/cockpitDisplayManager.hxx
@@ -43,6 +43,9 @@ public:
     void init() override;
     InitStatus incrementalInit() override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "cockpit-displays"; }
+
 private:
     bool build (SGPropertyNode* config_props);
 
diff --git a/src/Cockpit/groundradar.hxx b/src/Cockpit/groundradar.hxx
index a69f58a63..ca93d4f19 100644
--- a/src/Cockpit/groundradar.hxx
+++ b/src/Cockpit/groundradar.hxx
@@ -41,6 +41,9 @@ class GroundRadar : public SGSubsystem,
                     private FGODGauge
 {
 public:
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "groundradar"; }
+
     static const int TextureHalfSize = 256;
     GroundRadar(SGPropertyNode* node);
     virtual ~GroundRadar();
diff --git a/src/Cockpit/wxradar.hxx b/src/Cockpit/wxradar.hxx
index 5a4fe7609..33df8a37c 100644
--- a/src/Cockpit/wxradar.hxx
+++ b/src/Cockpit/wxradar.hxx
@@ -49,6 +49,9 @@ public:
     void shutdown() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "radar"; }
+
     virtual void valueChanged(SGPropertyNode *);
 
 protected:
diff --git a/src/Environment/environment_ctrl.cxx b/src/Environment/environment_ctrl.cxx
index a50d569d0..810dc4e7a 100644
--- a/src/Environment/environment_ctrl.cxx
+++ b/src/Environment/environment_ctrl.cxx
@@ -114,6 +114,9 @@ public:
     void unbind() override;
     void update(double delta_time_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "layer-interpolate-controller"; }
+
 private:
     SGPropertyNode_ptr _rootNode;
     bool _enabled;
diff --git a/src/Environment/environment_mgr.hxx b/src/Environment/environment_mgr.hxx
index 71dd1f649..ab4c5812a 100644
--- a/src/Environment/environment_mgr.hxx
+++ b/src/Environment/environment_mgr.hxx
@@ -54,6 +54,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "environment"; }
+
     /**
      * Get the environment information for the plane's current position.
      */
diff --git a/src/Environment/magvarmanager.hxx b/src/Environment/magvarmanager.hxx
index 73c4ac32a..c024c5dc8 100644
--- a/src/Environment/magvarmanager.hxx
+++ b/src/Environment/magvarmanager.hxx
@@ -40,6 +40,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "magvar"; }
+
 private:
     std::unique_ptr<SGMagVar> _magVar;
 
diff --git a/src/Environment/precipitation_mgr.hxx b/src/Environment/precipitation_mgr.hxx
index c71f01ab3..f634da135 100644
--- a/src/Environment/precipitation_mgr.hxx
+++ b/src/Environment/precipitation_mgr.hxx
@@ -51,6 +51,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "precipitation"; }
+
     void setupSceneGraph(void);
     void setPrecipitationLevel(double l);
 };
diff --git a/src/Environment/realwx_ctrl.cxx b/src/Environment/realwx_ctrl.cxx
index c7066fd97..7e255e42f 100644
--- a/src/Environment/realwx_ctrl.cxx
+++ b/src/Environment/realwx_ctrl.cxx
@@ -412,6 +412,9 @@ public:
     {
     }
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "noaa-metar-real-wx-controller"; }
+
 private:
     std::string noaa_base_url;
 };
diff --git a/src/Environment/ridge_lift.hxx b/src/Environment/ridge_lift.hxx
index 5518f1668..8f82a51e7 100644
--- a/src/Environment/ridge_lift.hxx
+++ b/src/Environment/ridge_lift.hxx
@@ -50,6 +50,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "ridgelift"; }
+
     inline double getStrength() const { return strength; };
 
     inline double get_probe_elev_m( int index ) const { return probe_elev_m[index]; };
diff --git a/src/Environment/terrainsampler.cxx b/src/Environment/terrainsampler.cxx
index 6179b0700..d8b0ac8b1 100644
--- a/src/Environment/terrainsampler.cxx
+++ b/src/Environment/terrainsampler.cxx
@@ -57,6 +57,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "area"; }
+
     int getElevationHistogramStep() const { return _elevationHistogramStep; }
     void setElevationHistograpStep( int value ) {
         _elevationHistogramStep = value > 0 ? value : 500;
@@ -333,6 +336,9 @@ public:
     void unbind() override;
     void update(double delta_time_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "terrain-sampler"; }
+
 private:
     inline string areaSubsystemName( unsigned i ) {
         ostringstream name;
diff --git a/src/FDM/ExternalNet/ExternalNet.hxx b/src/FDM/ExternalNet/ExternalNet.hxx
index 066443c85..06874ff62 100644
--- a/src/FDM/ExternalNet/ExternalNet.hxx
+++ b/src/FDM/ExternalNet/ExternalNet.hxx
@@ -57,6 +57,9 @@ public:
     // Subsystem API.
     void init() override;
     void update(double dt) override;
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "network"; }
 };
 
 #endif // _EXTERNAL_NET_HXX
diff --git a/src/FDM/ExternalPipe/ExternalPipe.hxx b/src/FDM/ExternalPipe/ExternalPipe.hxx
index 7ca5a2366..ecf366467 100644
--- a/src/FDM/ExternalPipe/ExternalPipe.hxx
+++ b/src/FDM/ExternalPipe/ExternalPipe.hxx
@@ -73,6 +73,9 @@ public:
     // Subsystem API.
     void init() override;
     void update(double dt) override;
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "pipe"; }
 };
 
 #endif // _EXTERNAL_PIPE_HXX
diff --git a/src/FDM/JSBSim/JSBSim.hxx b/src/FDM/JSBSim/JSBSim.hxx
index aac75222c..b601f490d 100644
--- a/src/FDM/JSBSim/JSBSim.hxx
+++ b/src/FDM/JSBSim/JSBSim.hxx
@@ -114,6 +114,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "jsb"; }
+
     /// copy FDM state to LaRCsim structures
     bool copy_to_JSBsim();
 
diff --git a/src/FDM/LaRCsim/LaRCsim.hxx b/src/FDM/LaRCsim/LaRCsim.hxx
index 01f2fe81c..47781df16 100644
--- a/src/FDM/LaRCsim/LaRCsim.hxx
+++ b/src/FDM/LaRCsim/LaRCsim.hxx
@@ -52,6 +52,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "larcsim"; }
+
     // copy FDM state to LaRCsim structures
     bool copy_to_LaRCsim();
 
diff --git a/src/FDM/NullFDM.hxx b/src/FDM/NullFDM.hxx
index 700cf5b2e..f909c8eb0 100644
--- a/src/FDM/NullFDM.hxx
+++ b/src/FDM/NullFDM.hxx
@@ -38,6 +38,9 @@ public:
     // Subsystem API.
     void init() override;
     void update(double dt) override;
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "null"; }
 };
 
 #endif // _NULLFDM_HXX
diff --git a/src/FDM/SP/ACMS.hxx b/src/FDM/SP/ACMS.hxx
index 566014324..a26bd39cc 100644
--- a/src/FDM/SP/ACMS.hxx
+++ b/src/FDM/SP/ACMS.hxx
@@ -38,6 +38,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "acms"; }
+
 private:
     SGPropertyNode_ptr _alt, _speed, _climb_rate;
     SGPropertyNode_ptr _pitch, _roll, _heading;
diff --git a/src/FDM/SP/ADA.hxx b/src/FDM/SP/ADA.hxx
index 061f607e1..0a2006d67 100644
--- a/src/FDM/SP/ADA.hxx
+++ b/src/FDM/SP/ADA.hxx
@@ -76,6 +76,9 @@ public:
     // Subsystem API.
     void init() override;
     void update(double dt) override;
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "ada"; }
 };
 
 #endif // _ADA_HXX
diff --git a/src/FDM/SP/AISim.hpp b/src/FDM/SP/AISim.hpp
index 1636c53bf..ef51da69b 100644
--- a/src/FDM/SP/AISim.hpp
+++ b/src/FDM/SP/AISim.hpp
@@ -79,6 +79,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "aisim"; }
+
     bool load(std::string path);
 
 #ifdef ENABLE_SP_FDM
diff --git a/src/FDM/SP/Balloon.h b/src/FDM/SP/Balloon.h
index 42a07caa5..dc64ff76c 100644
--- a/src/FDM/SP/Balloon.h
+++ b/src/FDM/SP/Balloon.h
@@ -67,6 +67,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "balloon"; }
+
     // copy FDM state to BalloonSim structures
     bool copy_to_BalloonSim();
 
diff --git a/src/FDM/SP/MagicCarpet.hxx b/src/FDM/SP/MagicCarpet.hxx
index 92ea7d23d..8ae2b2799 100644
--- a/src/FDM/SP/MagicCarpet.hxx
+++ b/src/FDM/SP/MagicCarpet.hxx
@@ -37,6 +37,9 @@ public:
     // Subsystem API.
     void init() override;
     void update(double dt) override;
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "magic"; }
 };
 
 #endif // _MAGICCARPET_HXX
diff --git a/src/FDM/UFO.hxx b/src/FDM/UFO.hxx
index d1e08d807..ba0cb62e9 100644
--- a/src/FDM/UFO.hxx
+++ b/src/FDM/UFO.hxx
@@ -67,6 +67,9 @@ public:
     // Subsystem API.
     void init() override;
     void update(double dt) override;
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "ufo"; }
 };
 
 #endif // _UFO_HXX
diff --git a/src/FDM/YASim/YASim.hxx b/src/FDM/YASim/YASim.hxx
index 2f23a1638..37bfa6c4d 100644
--- a/src/FDM/YASim/YASim.hxx
+++ b/src/FDM/YASim/YASim.hxx
@@ -18,6 +18,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "yasim"; }
+
 private:
     void report();
     void copyFromYASim();
diff --git a/src/Input/FGHIDEventInput.hxx b/src/Input/FGHIDEventInput.hxx
index cbfe09cbc..8f9d39e01 100644
--- a/src/Input/FGHIDEventInput.hxx
+++ b/src/Input/FGHIDEventInput.hxx
@@ -47,7 +47,7 @@ public:
     void update(double dt) override;
 
     // Subsystem identification.
-    static const char* staticSubsystemClassId() { return "input-hid"; }
+    static const char* staticSubsystemClassId() { return "input-event-hid"; }
 
 private:
     class FGHIDEventInputPrivate;
diff --git a/src/Input/FGJoystickInput.hxx b/src/Input/FGJoystickInput.hxx
index aa1ce1090..642950d6f 100644
--- a/src/Input/FGJoystickInput.hxx
+++ b/src/Input/FGJoystickInput.hxx
@@ -49,6 +49,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "input-joystick"; }
+
     static const int MAX_JOYSTICKS        = 16;
     static const int MAX_JOYSTICK_AXES    = _JS_MAX_AXES;
     static const int MAX_JOYSTICK_BUTTONS = 32;
diff --git a/src/Input/FGKeyboardInput.hxx b/src/Input/FGKeyboardInput.hxx
index fa93ab077..82e21aad1 100644
--- a/src/Input/FGKeyboardInput.hxx
+++ b/src/Input/FGKeyboardInput.hxx
@@ -51,6 +51,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "input-keyboard"; }
+
     static const int MAX_KEYS = 1024;
 
 private:
diff --git a/src/Input/FGLinuxEventInput.hxx b/src/Input/FGLinuxEventInput.hxx
index db6696ca4..ac8af1e8a 100644
--- a/src/Input/FGLinuxEventInput.hxx
+++ b/src/Input/FGLinuxEventInput.hxx
@@ -75,6 +75,9 @@ public:
     void postinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "input-event"; }
+
 protected:
 };
 
diff --git a/src/Input/FGMacOSXEventInput.hxx b/src/Input/FGMacOSXEventInput.hxx
index c6432e2d6..4dd2ecd4d 100644
--- a/src/Input/FGMacOSXEventInput.hxx
+++ b/src/Input/FGMacOSXEventInput.hxx
@@ -55,6 +55,9 @@ public:
     void shutdown() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "input-event"; }
+
 private:
     friend class FGMacOSXEventInputPrivate;
 
diff --git a/src/Instrumentation/HUD/HUD.hxx b/src/Instrumentation/HUD/HUD.hxx
index 81368587b..0999f2fbe 100644
--- a/src/Instrumentation/HUD/HUD.hxx
+++ b/src/Instrumentation/HUD/HUD.hxx
@@ -127,6 +127,9 @@ public:
     void reinit() override;
     void update(double) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "hud"; }
+
     // called from Main/renderer.cxx to draw 2D and 3D HUD
     void draw(osg::State&);
 
diff --git a/src/Instrumentation/KLN89/kln89.hxx b/src/Instrumentation/KLN89/kln89.hxx
index 00468d5e4..04cc6436a 100644
--- a/src/Instrumentation/KLN89/kln89.hxx
+++ b/src/Instrumentation/KLN89/kln89.hxx
@@ -102,6 +102,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "KLN89"; }
+
     // Set Units
     // m if true, ft if false
     inline void SetAltUnitsSI(bool b) { _altUnits = (b ? GPS_ALT_UNITS_M : GPS_ALT_UNITS_FT); }
diff --git a/src/Instrumentation/adf.hxx b/src/Instrumentation/adf.hxx
index 01ddb0775..b7d90e905 100644
--- a/src/Instrumentation/adf.hxx
+++ b/src/Instrumentation/adf.hxx
@@ -47,6 +47,9 @@ public:
     void init() override;
     void update(double delta_time_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "adf"; }
+
 private:
     void set_bearing (double delta_time_sec, double bearing);
 
diff --git a/src/Instrumentation/airspeed_indicator.hxx b/src/Instrumentation/airspeed_indicator.hxx
index f8b0a135b..9ecf11fb6 100644
--- a/src/Instrumentation/airspeed_indicator.hxx
+++ b/src/Instrumentation/airspeed_indicator.hxx
@@ -45,6 +45,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "airspeed-indicator"; }
+
 private:
     void computeMach();
 
diff --git a/src/Instrumentation/altimeter.hxx b/src/Instrumentation/altimeter.hxx
index 26278fda4..67d094958 100644
--- a/src/Instrumentation/altimeter.hxx
+++ b/src/Instrumentation/altimeter.hxx
@@ -40,6 +40,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "altimeter"; }
+
     double getSettingInHg() const;
     void setSettingInHg( double value );
     double getSettingHPa() const;
diff --git a/src/Instrumentation/attitude_indicator.hxx b/src/Instrumentation/attitude_indicator.hxx
index 0ca4a9e69..18d161276 100644
--- a/src/Instrumentation/attitude_indicator.hxx
+++ b/src/Instrumentation/attitude_indicator.hxx
@@ -49,6 +49,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "attitude-indicator"; }
+
 private:
     std::string _name;
     int _num;
diff --git a/src/Instrumentation/clock.hxx b/src/Instrumentation/clock.hxx
index 2c986fecf..791e98790 100644
--- a/src/Instrumentation/clock.hxx
+++ b/src/Instrumentation/clock.hxx
@@ -36,6 +36,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "clock"; }
+
 private:
     std::string _name;
     unsigned int _num;
diff --git a/src/Instrumentation/commradio.hxx b/src/Instrumentation/commradio.hxx
index e3bdeb5ae..55d25805e 100644
--- a/src/Instrumentation/commradio.hxx
+++ b/src/Instrumentation/commradio.hxx
@@ -40,6 +40,9 @@ typedef SGSharedPtr<SignalQualityComputer> SignalQualityComputerRef;
 class CommRadio : public AbstractInstrument
 {
 public:
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "comm-radio"; }
+
     static SGSubsystem * createInstance( SGPropertyNode_ptr rootNode );
 };
 
diff --git a/src/Instrumentation/dme.hxx b/src/Instrumentation/dme.hxx
index 5f6d76153..632834ed6 100644
--- a/src/Instrumentation/dme.hxx
+++ b/src/Instrumentation/dme.hxx
@@ -43,6 +43,9 @@ public:
     void reinit() override;
     void update(double delta_time_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "dme"; }
+
 private:
 	void clear();
 
diff --git a/src/Instrumentation/gps.hxx b/src/Instrumentation/gps.hxx
index 97b522531..69151ef3e 100644
--- a/src/Instrumentation/gps.hxx
+++ b/src/Instrumentation/gps.hxx
@@ -71,6 +71,9 @@ public:
     void unbind() override;
     void update(double delta_time_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "gps"; }
+
     // RNAV interface
     virtual SGGeod position();
     virtual double trackDeg();
diff --git a/src/Instrumentation/gsdi.hxx b/src/Instrumentation/gsdi.hxx
index 15c1019b4..a49f223bb 100644
--- a/src/Instrumentation/gsdi.hxx
+++ b/src/Instrumentation/gsdi.hxx
@@ -51,6 +51,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "gsdi"; }
+
 private:
     std::string _name;
     unsigned int _num;
diff --git a/src/Instrumentation/heading_indicator.hxx b/src/Instrumentation/heading_indicator.hxx
index 54d9bb55c..7b106330d 100644
--- a/src/Instrumentation/heading_indicator.hxx
+++ b/src/Instrumentation/heading_indicator.hxx
@@ -46,6 +46,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "heading-indicator"; }
+
 private:
     Gyro _gyro;
     double _last_heading_deg;
diff --git a/src/Instrumentation/heading_indicator_dg.hxx b/src/Instrumentation/heading_indicator_dg.hxx
index 1047d90a1..029a2cd2b 100644
--- a/src/Instrumentation/heading_indicator_dg.hxx
+++ b/src/Instrumentation/heading_indicator_dg.hxx
@@ -44,6 +44,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "heading-indicator-dg"; };
+
 private:
     Gyro _gyro;
     double _last_heading_deg, _last_indicated_heading_dg;
diff --git a/src/Instrumentation/heading_indicator_fg.hxx b/src/Instrumentation/heading_indicator_fg.hxx
index a3dad5955..2868342e9 100644
--- a/src/Instrumentation/heading_indicator_fg.hxx
+++ b/src/Instrumentation/heading_indicator_fg.hxx
@@ -46,6 +46,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "heading-indicator-fg"; }
+
 private:
     Gyro _gyro;
     double _last_heading_deg;
diff --git a/src/Instrumentation/inst_vertical_speed_indicator.hxx b/src/Instrumentation/inst_vertical_speed_indicator.hxx
index 2762f897e..7bf8aa59b 100644
--- a/src/Instrumentation/inst_vertical_speed_indicator.hxx
+++ b/src/Instrumentation/inst_vertical_speed_indicator.hxx
@@ -59,6 +59,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "inst-vertical-speed-indicator"; }
+
 private:
     std::string _name;
     int _num;
diff --git a/src/Instrumentation/instrument_mgr.hxx b/src/Instrumentation/instrument_mgr.hxx
index ec42e43f9..43cbf00bc 100644
--- a/src/Instrumentation/instrument_mgr.hxx
+++ b/src/Instrumentation/instrument_mgr.hxx
@@ -35,6 +35,9 @@ public:
     void init() override;
     InitStatus incrementalInit() override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "instrumentation"; }
+
 private:
     bool build (SGPropertyNode* config_props);
 
diff --git a/src/Instrumentation/kr_87.hxx b/src/Instrumentation/kr_87.hxx
index 2dee3d941..ef14e0c6e 100644
--- a/src/Instrumentation/kr_87.hxx
+++ b/src/Instrumentation/kr_87.hxx
@@ -115,6 +115,9 @@ public:
     void unbind() override;
     void update(double dt_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "KR-87"; }
+
     // Update nav/adf radios based on current postition
     void search ();
 
diff --git a/src/Instrumentation/mag_compass.hxx b/src/Instrumentation/mag_compass.hxx
index f5d06edc7..ff81dba21 100644
--- a/src/Instrumentation/mag_compass.hxx
+++ b/src/Instrumentation/mag_compass.hxx
@@ -50,6 +50,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "magnetic-compass"; }
+
 private:
     double _rate_degps;
 
diff --git a/src/Instrumentation/marker_beacon.hxx b/src/Instrumentation/marker_beacon.hxx
index d52d06b2e..c2d91dd03 100644
--- a/src/Instrumentation/marker_beacon.hxx
+++ b/src/Instrumentation/marker_beacon.hxx
@@ -73,6 +73,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "marker-beacon"; }
+
     void search ();
 
     // Marker Beacon Accessors
diff --git a/src/Instrumentation/mk_viii.hxx b/src/Instrumentation/mk_viii.hxx
index 35b7d9ada..e65c58795 100644
--- a/src/Instrumentation/mk_viii.hxx
+++ b/src/Instrumentation/mk_viii.hxx
@@ -1379,6 +1379,9 @@ public:
     void init() override;
     void unbind() override;
     void update(double dt) override;
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "mk-viii"; }
 };
 
 #ifdef _MSC_VER
diff --git a/src/Instrumentation/mrg.hxx b/src/Instrumentation/mrg.hxx
index 6e517a75f..08a705810 100644
--- a/src/Instrumentation/mrg.hxx
+++ b/src/Instrumentation/mrg.hxx
@@ -47,6 +47,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "master-reference-gyro"; }
+
 private:
     static const double gravity; //conversion factor
 
diff --git a/src/Instrumentation/navradio.hxx b/src/Instrumentation/navradio.hxx
index bebbed7c0..3e2b39e04 100644
--- a/src/Instrumentation/navradio.hxx
+++ b/src/Instrumentation/navradio.hxx
@@ -178,6 +178,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "old-navradio"; }
+
     // Update nav/adf radios based on current postition
     void search ();
     void updateNav();
diff --git a/src/Instrumentation/newnavradio.hxx b/src/Instrumentation/newnavradio.hxx
index 2e64579b4..e72a24d48 100644
--- a/src/Instrumentation/newnavradio.hxx
+++ b/src/Instrumentation/newnavradio.hxx
@@ -31,6 +31,9 @@ namespace Instrumentation {
 class NavRadio : public SGSubsystem
 {
 public:
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "nav-radio"; }
+
     static SGSubsystem * createInstance( SGPropertyNode_ptr rootNode );
 };
 
diff --git a/src/Instrumentation/rad_alt.hxx b/src/Instrumentation/rad_alt.hxx
index 754857af9..2cc1b5f82 100644
--- a/src/Instrumentation/rad_alt.hxx
+++ b/src/Instrumentation/rad_alt.hxx
@@ -38,6 +38,9 @@ public:
     void init() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "radar-altimeter"; }
+
 private:
     void update_altitude();
     void updateSetHeight();
diff --git a/src/Instrumentation/slip_skid_ball.hxx b/src/Instrumentation/slip_skid_ball.hxx
index 6d808dca5..145ec45d2 100644
--- a/src/Instrumentation/slip_skid_ball.hxx
+++ b/src/Instrumentation/slip_skid_ball.hxx
@@ -39,6 +39,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "slip-skid-ball"; }
+
 private:
     std::string _name;
     int _num;
diff --git a/src/Instrumentation/tacan.hxx b/src/Instrumentation/tacan.hxx
index 4763d8449..071f9ec31 100644
--- a/src/Instrumentation/tacan.hxx
+++ b/src/Instrumentation/tacan.hxx
@@ -43,6 +43,9 @@ public:
     void reinit() override;
     void update(double delta_time_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "tacan"; }
+
 private:
     void disabled(bool force = false);
 
diff --git a/src/Instrumentation/tcas.hxx b/src/Instrumentation/tcas.hxx
index 6d768862d..1f0c5d543 100644
--- a/src/Instrumentation/tcas.hxx
+++ b/src/Instrumentation/tcas.hxx
@@ -388,6 +388,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "tcas"; }
+
     /* configuration options */
     int  _verticalRange;
     int  _lateralRange;
diff --git a/src/Instrumentation/transponder.hxx b/src/Instrumentation/transponder.hxx
index 4a81fb0aa..b14330c56 100644
--- a/src/Instrumentation/transponder.hxx
+++ b/src/Instrumentation/transponder.hxx
@@ -40,6 +40,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "transponder"; }
+
 protected:
     bool isPowerSwitchOn() const override;
 
diff --git a/src/Instrumentation/turn_indicator.hxx b/src/Instrumentation/turn_indicator.hxx
index 15399e474..f5cfbd9af 100644
--- a/src/Instrumentation/turn_indicator.hxx
+++ b/src/Instrumentation/turn_indicator.hxx
@@ -48,6 +48,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "turn-indicator"; }
+
 private:
     Gyro _gyro;
     double _last_rate;
diff --git a/src/Instrumentation/vertical_speed_indicator.hxx b/src/Instrumentation/vertical_speed_indicator.hxx
index 9387b2021..f5df5de16 100644
--- a/src/Instrumentation/vertical_speed_indicator.hxx
+++ b/src/Instrumentation/vertical_speed_indicator.hxx
@@ -42,6 +42,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "vertical-speed-indicator"; }
+
 private:
     double _casing_pressure_Pa = 0.0;
     double _casing_airmass_kg = 0.0;
diff --git a/src/Main/FGInterpolator.hxx b/src/Main/FGInterpolator.hxx
index d317403e5..dc2420407 100644
--- a/src/Main/FGInterpolator.hxx
+++ b/src/Main/FGInterpolator.hxx
@@ -26,6 +26,9 @@ class FGInterpolator : public simgear::PropertyInterpolationMgr
 public:
     FGInterpolator();
     ~FGInterpolator();
+
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "prop-interpolator"; }
 };
 
 #endif /* FG_INTERPOLATOR_HXX_ */
diff --git a/src/Main/fg_io.hxx b/src/Main/fg_io.hxx
index 61c957d18..8f9fe97e2 100644
--- a/src/Main/fg_io.hxx
+++ b/src/Main/fg_io.hxx
@@ -48,12 +48,16 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "io"; }
+
     /**
      * helper to determine early in startup, if MP will be used.
      * This information is needed in the position-init code, to adjust the
      * start position off active runways.
      */
     static bool isMultiplayerRequested();
+
 private:
     void add_channel(const std::string& config);
     FGProtocol* parse_port_config( const std::string& cfgstr );
diff --git a/src/Main/fg_props.hxx b/src/Main/fg_props.hxx
index 7b910485d..6399ecbbd 100644
--- a/src/Main/fg_props.hxx
+++ b/src/Main/fg_props.hxx
@@ -29,6 +29,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "properties"; }
+
 private:
     simgear::TiedPropertyList _tiedProperties;
 
diff --git a/src/Main/logger.hxx b/src/Main/logger.hxx
index 13498aae4..1470e3f09 100644
--- a/src/Main/logger.hxx
+++ b/src/Main/logger.hxx
@@ -27,6 +27,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "logger"; }
+
 private:
     /**
      * A single instance of a log file (the logger can contain many).
diff --git a/src/MultiPlayer/multiplaymgr.hxx b/src/MultiPlayer/multiplaymgr.hxx
index a0c004b13..bc2556631 100644
--- a/src/MultiPlayer/multiplaymgr.hxx
+++ b/src/MultiPlayer/multiplaymgr.hxx
@@ -60,6 +60,9 @@ public:
     void shutdown() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "mp"; }
+
     // transmitter
 
     void SendTextMessage(const std::string &sMsgText);
diff --git a/src/Network/Swift/swift_connection.hxx b/src/Network/Swift/swift_connection.hxx
index 28f689446..088823729 100644
--- a/src/Network/Swift/swift_connection.hxx
+++ b/src/Network/Swift/swift_connection.hxx
@@ -47,6 +47,9 @@ public:
     void shutdown() override;
     void update(double delta_time_sec) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "swift"; }
+
     bool startServer(const SGPropertyNode* arg, SGPropertyNode* root);
     bool stopServer(const SGPropertyNode* arg, SGPropertyNode* root);
     FGSwiftBus::CPlugin* plug;
diff --git a/src/Network/fgcom.hxx b/src/Network/fgcom.hxx
index 86e44fedd..40b90b810 100644
--- a/src/Network/fgcom.hxx
+++ b/src/Network/fgcom.hxx
@@ -38,6 +38,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "fgcom"; }
+
     virtual void valueChanged(SGPropertyNode *prop);
     void iaxTextEvent(struct iaxc_ev_text text);
 
diff --git a/src/Network/http/httpd.cxx b/src/Network/http/httpd.cxx
index 72e2bd4c9..d3f83fe46 100644
--- a/src/Network/http/httpd.cxx
+++ b/src/Network/http/httpd.cxx
@@ -185,6 +185,9 @@ public:
     void unbind() override;          // shutdown of mongoose, clear connections, unregister URIHandlers
     void update(double dt) override; // poll connections, check for changed properties
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "mongoose-httpd"; }
+
     /**
      * Returns a URIHandler for the given uri
      *
diff --git a/src/Network/http/httpd.hxx b/src/Network/http/httpd.hxx
index 1574a5cb7..68c415d95 100644
--- a/src/Network/http/httpd.hxx
+++ b/src/Network/http/httpd.hxx
@@ -34,6 +34,9 @@ extern const char * PROPERTY_ROOT;
 class FGHttpd : public SGSubsystem
 {
 public:
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "httpd"; }
+
     static FGHttpd * createInstance( SGPropertyNode_ptr configNode );
 };
 
diff --git a/src/Sound/voice.hxx b/src/Sound/voice.hxx
index bfaa96d46..ab96557ba 100644
--- a/src/Sound/voice.hxx
+++ b/src/Sound/voice.hxx
@@ -61,6 +61,9 @@ public:
     void shutdown() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "voice"; }
+
     class FGVoice;
 
 protected:
diff --git a/src/Systems/electrical.hxx b/src/Systems/electrical.hxx
index 1d7ebf63a..ae78982ac 100644
--- a/src/Systems/electrical.hxx
+++ b/src/Systems/electrical.hxx
@@ -225,6 +225,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "electrical"; }
+
     bool build (SGPropertyNode* config_props);
     float propagate( FGElectricalComponent *node, double dt,
                      float input_volts, float input_amps,
diff --git a/src/Systems/pitot.hxx b/src/Systems/pitot.hxx
index 4b2c55fe2..fe5d7d833 100644
--- a/src/Systems/pitot.hxx
+++ b/src/Systems/pitot.hxx
@@ -50,6 +50,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "pitot"; }
+
 private:
     std::string _name;
     int _num;
diff --git a/src/Systems/static.hxx b/src/Systems/static.hxx
index f9551721e..7c1860f7b 100644
--- a/src/Systems/static.hxx
+++ b/src/Systems/static.hxx
@@ -47,6 +47,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "static"; }
+
 private:
     std::string _name;
     int _num;
diff --git a/src/Systems/system_mgr.hxx b/src/Systems/system_mgr.hxx
index 8021e24b4..4647cc0b7 100644
--- a/src/Systems/system_mgr.hxx
+++ b/src/Systems/system_mgr.hxx
@@ -31,6 +31,9 @@ public:
     FGSystemMgr ();
     virtual ~FGSystemMgr ();
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "systems"; }
+
     bool build (SGPropertyNode* config_props);
 };
 
diff --git a/src/Systems/vacuum.hxx b/src/Systems/vacuum.hxx
index 63287de87..a0334eee0 100644
--- a/src/Systems/vacuum.hxx
+++ b/src/Systems/vacuum.hxx
@@ -47,6 +47,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "vacuum"; }
+
 private:
     std::string _name;
     int _num;
diff --git a/src/Time/light.hxx b/src/Time/light.hxx
index 7fd88c13b..e3725f930 100644
--- a/src/Time/light.hxx
+++ b/src/Time/light.hxx
@@ -146,6 +146,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "lighting"; }
+
     // Color related functions
 
     inline const SGVec4f& scene_ambient () const { return _scene_ambient; }
diff --git a/src/Traffic/TrafficMgr.hxx b/src/Traffic/TrafficMgr.hxx
index 3a790ac52..ff3b9dc09 100644
--- a/src/Traffic/TrafficMgr.hxx
+++ b/src/Traffic/TrafficMgr.hxx
@@ -118,6 +118,9 @@ public:
     void init() override;
     void update(double time) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "traffic-manager"; }
+
     FGScheduledFlightVecIterator getFirstFlight(const std::string &ref) { return flights[ref].begin(); }
     FGScheduledFlightVecIterator getLastFlight(const std::string &ref) { return flights[ref].end(); }
 };
diff --git a/src/Viewer/view.hxx b/src/Viewer/view.hxx
index 1fb6d8af4..b3a5be3a1 100644
--- a/src/Viewer/view.hxx
+++ b/src/Viewer/view.hxx
@@ -72,6 +72,8 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "view"; }
 
     //////////////////////////////////////////////////////////////////////
     // Part 2: user settings.
diff --git a/utils/fgpanel/FGPanel.hxx b/utils/fgpanel/FGPanel.hxx
index b08c7d1af..718e3dc9b 100644
--- a/utils/fgpanel/FGPanel.hxx
+++ b/utils/fgpanel/FGPanel.hxx
@@ -63,6 +63,9 @@ public:
     void unbind() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "panel"; }
+
     // transfer pointer ownership!!!
     virtual void addInstrument (FGPanelInstrument * const instrument);
 
diff --git a/utils/fgpanel/FGPanelProtocol.hxx b/utils/fgpanel/FGPanelProtocol.hxx
index dc85e7fb2..df818300b 100644
--- a/utils/fgpanel/FGPanelProtocol.hxx
+++ b/utils/fgpanel/FGPanelProtocol.hxx
@@ -39,6 +39,9 @@ public:
     void reinit() override;
     void update(double dt) override;
 
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "panel-protocol"; }
+
 private:
     SGPropertyNode_ptr root;
     SGIOChannel *io;
diff --git a/utils/fgpanel/panel_io.hxx b/utils/fgpanel/panel_io.hxx
index cf9d5feed..d24db4e0f 100644
--- a/utils/fgpanel/panel_io.hxx
+++ b/utils/fgpanel/panel_io.hxx
@@ -34,6 +34,9 @@
 class FGReadablePanel : public FGPanel
 {
 public:
+    // Subsystem identification.
+    static const char* staticSubsystemClassId() { return "readable-panel"; }
+
     static SGSharedPtr<FGPanel> read (SGPropertyNode_ptr root);
 };