Electrical and mechanical characteristics of equipment which will provide for the interchangeability of recordings made on magnetic video recording and/or reproducing systems using 25.4 mm (1 in) tape on type C helical video tape recorders.Cross References:BS 3732:Part 1BS 4967BS 5428:Part 9BS 5575BS 6288:Part 1BS 6288:Part 2BS 6288:Part 3BS 6288:Part 6BS 6865