TM  1-1520-240-10 Change 20          4-1-21 No. Symbol Source Range/Description 1    Angle of Pitch Scale HUD System "30_ (10_ units, tic marks flash when angle of pitch is u"30_) 2    Bearing to Waypoint - Pointer Doppler 0 - 359_ (cursor will invert “V” when aircraft is moving away from the waypoint) 3    Compass Reference Scale HUD System 0 - 359_ (10_ units) 4    Aircraft Heading Fix Index HUD System Fixed Reference Mark 5    Angle of Roll - Pointer Vertical Gyro, Co- pilot "30_ (right turn moves pointer to right, pointer flashes u"30_) 6    Angle of Roll - Scale HUD System "30_ (10_ units) 7    Barometric Altitude (MSl) Air Data Trans- ducer -1500 to 20,000 feet (set during adjustment mode) 8    Adjust/Program Mode Message HUD System ADJ or PROG 9    OK/FAIL HUD System OK or FAIL 10    Velocity Vector Doppler 0 - 15 knots/15 kilometers, 0-359_ 11    Rate of Climb Pointer Air Data Trans- ducer "2000 feet-per-minute (used with vertical speed scale, No. 15) 12    Radar Altitude (AGL) - Numeric Radar Altimeter, Pilot 0 - 1000 feet (0 - 200 feet, 1 foot units; 200 -1000 feet, 10 feet units; disappears above 999 feet, and reappears below 950 feet) 13    Minimum Altitude Warning Radar Altimeter, Pilot Blinking square around symbol - No. 12, set on pilot’s radar altimeter (use low set index) 14    Radar Altitude (AGL) Analog Bar Radar Altimeter, Pilot 0 - 200 feet (disappears at 250 feet, reappears at 225 feet; digital readout symbol, No. 12) 15    AGL Vertical Speed - Scale HUD System 0 -200 feet/"2000 feet-per-minute 16    HUD Fail Message HUD System CPM, SDR, SDA, PS, PDU, CPDU, NAV, PGM; can be cleared from the display by selecting “ACK” (See NOTE) 17    Trim (Slide Ball) Inclinometer "2 balls (left/right) 18    MST, MEM, HOOK Messages Master Caution Panel MST, MEM, HOOK; cannot be cleared from the display by selecting “ACK” NOTE:   After ACK is used to acknowledge a fault, the fault will not reappear until BIT is selected or power is cycled off and on. Figure  4-1-9.   CH-47D HUD Master Mode Symbology Display (Sheet 2 of 3)