Custodial services : Repairs and utilities - USA Voorschrift, Technical Manual, 5-609 Army ground forces : light aviation - USA War Department Field Manual, FM 20-100 Principles of automotive vehicles - USA Voorschrift, Technical Manual, 9-2700 Antenna coupling unit CU -128 A/U - USA Voorschrift, Technical Manual, 11-5000 Radar set AN/TPX-4 - USA Voorschrift, Technical Manual, 11-1160 Radio sets SCR-193-D, -G, -H, -J, -K, -KB, -KW, -L, -M, -P, -Q, -R, -S, -T, and -U - USA Voorschrift, Technical Manual, 11-273 Aircraft instruments - USA Technical Manual, TM 1-413 Radio transmitters BC-191-A, BC-191-B, BC-191-C, BC-191-D, BC-191-E, and BC-AA-191 - USA Voorschrift, Technical Manual, 11-800 Radio set SCR-503-A - USA Voorschrift, Technical Manual, 11-246A Radio set SCR-503-B (direction finding) - USA Voorschrift, Technical Manual, 11-246B Radio set SCR-556-A - USA Voorschrift, Technical Manual, 11-255 Radio set SCR-616 - USA Voorschrift, Technical Manual, 11-260