MIL-S-62353, MILITARY SPECIFICATION, SEMITRAILER, VAN: MOBILE TEMPEST TEST SET (MTTS) (4 APR 1983)., This specification covers a MTTS which consists of: (a) semitrailer housing rack mounted electronic equipment; two gasoline powered generators; shore power capability; and storage areas, and (b) commercial, fifth wheel equipped crewcab pickup truck.