I hope you gentlemen dont mind an observer interupting, but earlier in this thread it was commented on little data from an underwater nuclear shot - well shot baker from operation crossroads was a small (23 kiloton) sub surface test - detonation was at a depth of 90 feet with the seabed at 180feet.
the results are well documented , as it the `charlie` shot , cancelled at the time , but later tested as a deep shot (effects calculated as 30kt because of the depth) under operation wigwam; detonated at 2000 feet it completly destroyed the unmanned submarines, used at range for the est.
i believe the recordings are on a film somewhere , although i cannot remember the name.