Operation Military_operation Wigwam involved Participation a single test Testing of the Mark 90 Betty nuclear bomb .

6,800 personnel aboard 30 ships were involved Participation in `` Wigwam '' .

The purpose Aiming of `` Wigwam '' was to determine Deciding the vulnerability of submarines to deeply detonated Attack nuclear weapons , and to evaluate the feasibility of using such weapons in a combat situation .

`` Charlie '' was rescheduled Change_event_time as Operation Wigwam , a deep-water shot conducted Action in 1955 off the California coast .