Figure 8-31. Fire control subsystem, helmet-directed. cont'd

TM 9-258

Legend for figure 8-31:

extends over the operator's right eye, and an illuminated

1. Reflex sight M73

reticle pattern is projected into the optical sight.

2. Pilot helmet sight (including pilot linkage and

Electromechanical linkages sense the helmet sight lines

extension cable)

and generate sight-line signals which are processed by

3. Electronic interface

the electronic interface assembly. Either operator can

4. Gunner helmet sight including gunner linkage

command the gun turret or sight unit by means of

and extension cable)

operator-select able cockpit switches. Under certain

circumstances, the turret and sight unit can be

b. The system enables the helicopter pilot and

commanded simultaneously, one by each operator.

copilot/gunner to rapidly acquire visible targets and to

direct either the gun turret or the sight unit to those

targets. The helmet-mounted optical sight

8-33