 The final design coped with bomb failure by overshooting and rebounding into a center position.Thus following a failure and on initial ground launch it would be necessary to start or restart the sequence with a lower yield device.In the 1950s methods of adjusting bomb yield were in their infancy and considerable thought was given to providing a means of swapping out a standard yield bomb for a smaller yield one in a 2 or 3 second time frame or to provide an alternative means of firing low yield bombs.