OP-1171 Optical Equipment
Ordnance Pamphlet 1171 (Preliminary) describes rangefinders Mark 58 and Mark 58 with Mod 1 used in Gun Director Mark 50; and Rangefinders Mark 65 and Mark 65 Mod. 1 used in exposed deck mount Rangefinders Mount Mark 65.
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OP-1171 Optical Equipment (7 megs)
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