Table 4-1. Flight Symbology Definitions continued

Table 4-1. Flight Symbology Definitions continued - TM-1-1520-238-10_266

TM-1-1520-238-10 Helicopter Attack AH-64A Apache Manual
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TM 1-1520-238-10 4-4 Change 3 Table 4-1. Flight Symbology Definitions – continued Fig. 4-1 Ref No. Description Symbol Name 6 Acceleration Cue A vectorial representation of the helicopter longitudinal and lateral acceleration; the display origin is normally the end of the velocity vector. In the hover and bob-up modes, when the velocity vector exceeds its maximum scale, the display origin changes to the center of the LOS reticle. The Acceleration Cue will flash when the HARS inertial platform has gone into free inertial mode, usually as a result of the LDNS going into memory. 7 Velocity Vector A vectorial representation of the helicopter longitudinal and lateral ground velocities; in hover mode, maximum scale is 6 knots groundspeed; in transition mode 60 knots groundspeed. The velocity vector will flash when the HARS inertial platform has gone into the free inertial mode if MUX switch is in SEC. 8 Heading Scale Helicopter magnetic heading scale. 9 Cued LOS Reticle A virtual reticle indicating the cued LOS to the appropriate crew member. Used with the cueing dots. 10 Missile Constraints Indicates the required orientation to align the helicopter into constraints for Hellfire missile engagements. When all constraints for the mode of engagement are satisfied, the box will go from ‘dashed’ to ‘solid’. 11 Radar Altitude A digital display of radar altitude. Displays in 1-foot increments to 50 feet and in 10-foot increments above 50 feet. 12 Rate of Climb An analog display of rate of climb moving along the left side of the vertical scale. Tick marks designate 500 and 1000 fpm rates of climb or descent. 13 Radar Altitude Vertical Scale A vertical scale for the analog display of radar altitude. Tick marks designate 10-foot increments from 0 to 50-feet, and 50-foot increments from 50 to 200 feet. The scale is blanked when radar altitude is greater than 200 feet. 14 Radar Altitude Vertical Tape An analog display of radar altitude moving within the vertical scale; also blanked above 200 feet. 15 Skid/Slip Lubber Lines Represent the limits for ‘ball centered’ flight. 16 Skid/Slip Ball Indicates the amount of skid or slip the helicopter is experiencing. 17 Cued LOS DOT Indicates the cued LOS location within the field of regard. The cued LOS DOT will flash when the HARS inertial platform has gone into the free inertial mode. 18 Field of View Represents the instantaneous FOV of the crewmember sensor within the field of regard. 19 Sensor Field of Regard Represents the total gimbal limits possible for the respective crew member sensor. 20 High Action Display Refer to paragraph 4.28.

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