TM 5-3610-253-14
Remove glass rule from storage box and carefully insert smaller numbered end
into rear of periscope (numbers must be facing down).
b. Insert forward end ("O" end) of glass rule in pivoted bracket and set rear of
rule in mounting pedestal.
c.
Turn on power.
(1)
Unlock safety lock with operator key.
Turn main power switch on.
(2)
Press control power on switch.
(3)
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