Pilot Bombing - 100ft, 160 kts - all part of monthly training, using 8½ lb break up bombs dropped in pairs 100 ft apart to simulate a stick of depth charges. Used against a towed target (usually by marine craft), with a lookout in the tail to give you a score; ideally 50/50 zero line - a straddle - but anything within (IIRC) 80/20 and 15, as the 'kill' radius of the standard DC was not very large. It was also part of your annual cat exam - no misses allowed. Add in a burst from the 20mm Hispanos in the nose and it got quite exciting!!
Nav Bombing - 500ft, 160 kts, 1 bomb against stationary target such as radar buoy or marker marine/flame float, simulating a torpedo drop on to a datum. All done day or night, night with the added excitement of flares firing on the run in and photo-flashes (nasty things) going off afterwards.