The South African Air Force flight sergeant who testified at the TRC described a mobile VOR beacon that left his Pretoria-area base on the weekend of 19 October 1986 and returned the following week. Mbuzini is approximately 450 kilometres from Pretoria via road. Name two categories of military administrative records — both generated routinely in 1986 and potentially still archived — that could independently confirm or refute a vehicle deployment of that distance from the base during that specific weekend.