virtual void ExecModes( int newDesignate, int newDrop );
        virtual void UpdateState( int cursorXCmd, int cursorYCmd );
        virtual SimObjectType* Exec( SimObjectType* targetList );
        virtual void Display( VirtualDisplay* activeDisplay );

        // State control functions
        virtual void PushButton (int idx, int mfd = 0);
        virtual void RangeStep( int cmd )                       { wantRange = (cmd>0) ? rangeNM*2.0f: rangeNM*0.5f; };

        virtual void NextTarget( void )                         { wantLock = NEXT; };
        virtual void PrevTarget( void )                         { wantLock = PREV; };

        virtual void DefaultAAMode( void )                      { wantMode = AA; };
        virtual void StepAAmode( void );
        virtual void SetSRMOverride( void );
        virtual void SetMRMOverride( void );
        virtual void ClearOverride( void );

        virtual void SelectACMBore( void )                      { wantLock = BORE; };
        virtual void SelectACMVertical( void )          { if (mode == AA)  wantLock = AUTO; };
        virtual void SelectACMSlew( void )                      { if (mode == AA)  wantLock = AUTO; };
        virtual void SelectACM30x20( void )                     { if (mode == AA)  wantLock = AUTO; };

        virtual void DefaultAGMode( void )                      { wantMode = GM; };
        virtual void StepAGmode( void )                         { if (mode == GM) wantMode = GMT; else wantMode = GM; };
        virtual float GetRange (void) {return rangeNM;};
        virtual void GetCursorPosition (float* xPos, float* yPos) {*xPos = (cursorY + 1.0F)* rangeNM * 0.5F; *yPos = cursorX * rangeNM;};
        virtual void GetAGCenter( float* x, float* y );
        virtual int  IsAG (void)                                        { return mode != AA ? TRUE : FALSE; };
   virtual void SetMode (RadarMode cmd);

  protected:
        float                   rangeNM;                        // How far are we looking in NM
        float                   rangeFT;                        // How far are we looking in FT for convienience
        float                   invRangeFT;                     // 1/how far we're looking for convienience

        float                   prevRange;                      // Indicate where we were before AA override

        typedef enum { NOCHANGE=0, AUTO, CURSOR, BORE, NEXT, PREV } LockCommand;
        LockCommand             lockCmd;                        // Current desired target lock operation

        float                   cursorX;                        // radar cursor location in normalized display space
        float                   cursorY;                        // (ie:  -1.0 to 1.0)
        enum {CursorMoving = 0x1};
        int flags;

  protected:
        // Command queues -- These store commands until we're able to process them
        float           wantRange;
        RadarMode       wantMode;
        LockCommand     wantLock;

  protected:
        void NewRange( float rangeInNM );
        float CursorDelta( float x, float y );

        void ExecAG( void );
        void ExecAA( void );

        void DrawCursor( void );
        void DrawBullseyeData(void);
        void DrawLockedAirInfo( float h, float v );
        void DrawLockedGndInfo( float h, float v );
        void DrawWaterline(void);
        void DrawButtons(void);
        void DisplayAAReturns(void);
        void DisplayAGReturns(void);