MIL-STD-1477 Symbols for Army System Displays MetricThis standard prescribes the physical characteristics of ground and air track symbols, unit/installation symbols, control measures symbols, equipment symbols, and associated alphanumeric information for U.S. Army Combined Arms system displays which are generated by electronic, optic, or infrared technology and presents information in real time or near-real time.

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SYMBOL NAME

Multiple Engageable

SYMBOL SHAPE

REMARKS

Used with all track symbols

Air Track

when two or more tracks are

located in close proximity to

each other traveling in the

same general direction and

at similar speeds. The

symbol formed by the inner

line shall be the same size as

the single track symbol. The

outer line shall be separated

from the inner line by one

Single Engageable

stroke width of the line. All hostile and unknown

Air Track

track symbols shall be

displayed by a solid line

structure when such tracks

are or become engageable.

Single Unengageable

All hostile and unknown

Air Track

track symbols shall be

displayed by a dashed line

structure when such tracks

are or become unengageable

for any reason.

Multiple Unengageable

Same as single,

Air Track

unengageable air tracks.

Engaged Air Track

Indicates that a target is

(Single)*

under engagement by a fire

unit. The vertical dimension

of this modifier shall

susubtend a visual angle of not

less than 12 mrad of arc.

The modifiers shall be

centered on the basic air

track symbol.

To-Be-Engaged

Indicates that a target has

Air Track*

been assigned for manual or

automatic engagement. The

vertical dimension of this

modifier shall be the same as

that of the Engaged Hostile

modifier.

To-Be-Engaged Air

R

Same as To-Be-Engaged Air

Track-Ripple Fire*

Track except that more than

one missile is to be used.