category: aerial gunnery

... relays , since high power circuits can be switched remotely without danger to the operator . Control relays , as ... types of relays . 2 -1 To prevent this , shading coils ( sometimes. 556 AVIATION FIRE CONTROL TECHNICIAN 3 & 2.

... Instructions . TECHNICAL MANUALS ( TM ) 3-220 3-221 3-4240-258-14 3-6665-253 ... Manual : Mask , Chemical - Biological , Field , M17A1 and Accessories . Operator and ... Power Acquisition Radar and Computer ( ATBM ) ( Nike Hercules Anti ...