Goodness, haven't seen that particular version of a Dalton computer since my Wessex 1 days in the mid 60's! Used by the Observer down the back to calculate where we would jump to next to contain the submarine based on the information from the sonar operator and his Type 194 sonar.
Everything depended on flying the jump pattern very accurately with regards to speeds, angles of bank etc. or you wouldn't end up where the Observer intended. Day or night the jump height was 125 feet on the Rad Alt. Hover height 30 feet Rad Alt, initially hover maintained on Doppler, then switched to a cable hover once the sonar set was in the water.
Not in the hover by 19,600 CRPM? - then go around using the last 300 CRPM to struggle away with 50 ft/min rate of climb. What memories of those hot sweaty windless days and nights in the Far East trying to keep the machine out of the oggin! Glad I don't have to do that any more!