AIDA * Course in the Submarine Escape Training Tank (SETT) in Gosport, taught by Deeper Blue (see deeperblue.net/courses for more information). One of only a handful of such facilities, the tank trains submariners from around the world in a swimming pool 6m across and 28m deep. Amongst the students on the class were members of BSAC London No.1 Branch (see londondiver.com/)