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.
