I'm sure P.N. will be along later but the automated NBS system went something like this. The Nav. Rad. lined up his range and bearing markers to the target using the target or offset returns, from this , and other inputs, height, airspeed and the ballistics of the weapon etc. I think there were 8 terms in the formula, the NBS calculated a steer signal, displayed on the pilot's panel, and a forward throw value which was displayed on the Nav Panel. The NBS took the forward throw value and used that to calculate 2 other pre release signals, Lock Out and Bomb Doors. Lock Out froze the system and prevented any further input changes from altering the forward throw value and Bomb Doors was a fixed value dependant on the time taken for the doors to open. When Range To Target equalled Forward Throw the weapon was released.
What crew actions were required to permit release I have no idea.
Last edited by The Oberon; 21st Dec 2015 at 07:41.