Used on artcc critical & essential power system (aceps). function, switch, engine speed; reference data, typical application, ti 6980.102, fig 4-4, index 2, pg 4-4, vol 8
Used on air traffic control beacon interrogator radar system (atcbi-t). aka switch, rf chgovr; table 1, system manual for mssr system 80840/001, atcbi-6, 2nd edition, sec, 4, pg. 33