This'll be the wee beastie!! WE177 Nuc Depth BombInformation about it freely available on Wikipedia.
On my last 2 ships, (mid 90's), I was the Air Weapons bloke - my handling and prep courses for the torpedoes, DCs and missiles did not include the nuclear depth bomb as it was no longer in service.
In fact, one of my first jobs was to remove the fittings for the monitoring equipment for "the bomb" from the Air Weapons magazine as it was no longer required.
I'm guessing there must be another reason for 2 officers in helicopters...
There is a great deal of rubbish spoken of the thing. 'Suicide mission for Wasp pilots' - blah blah!! Nonsense. The only reason it was a single pilot mission was range. One extra crew meant 200Lbs of fuel - 12 minutes of flight time! That was range.
It was a PITA. Two man rule. Make an error loading and it was back to the start!!!