- lil 1s by airborne radars, in addition to an AN/MSQ-1 radar for one B~36. when the operation plan was published, two full-scale rehearsals, two practices, and two shots were planned.* A practice for TAK was scheduled for 18 July, a rehearsal for 2] July, and the actual event for 1 August. For ORANGE, a practice was acheduled for 24 July, a rehearsal for 28 July, and the actual event for 11 August. The Task Group 7.4 Operation Order 32-58 for TwAK was published on 6 July 1958.! The order stated that TuAk was to be a night ultra high altitude detonation occurring approximately five nautical miles south of Johnston Island, sometime between 2200 hours on 31 July 1958 and 0500 hours on 1 August 1958 (Johnston Island local time). Blast and wuclear radia= tion effects below 50,000 feet mean sea level were not expected to be sig- nificant at or beyond the air thermal safety distance of 31 nautical niles from Surface Zero. TEAK was not expected to produce significant fallout; hence, no post-shot cloud tracking or radiation safety re-entry surveys were declared to be necessary, Ten aircraft were scheduled to take part in TEAK: two B~36's, two C-97's, two P2V's (one for nose cone recovery), two AV2's, and two C=54's (one for search and rescue and one for observation). * A rehearsal was defined as a simulation of all phases of a pianned operation; a practice, as a simulation of one or a few, but not ail, phases.