TM 9-2350-222-10-2
ZERO SIGHTS (ZERO COMMANDER'S PERISCOPE TO CALIBER .50 MACHINE GUN)
Make Sure:
MASTER BATTERY switch (A) is set to ON.
Commander's periscope M36 or M36E1 has been adjusted (page 2-349)
Interrupter bar (B) is in upright position, and searchlight (C) is installed AN/VSS-2 (page
3-265) or AN/VSS-3A (page 3-271).
Boresighting of weapons and sights has been completed (page 2-340).
Vehicle is parked on as firm and level ground as possible.
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