 The course was run at Fort Blockhouse, Gosport, and from the depot ship HMS "Cyclops" in the Clyde, where the 7th Submarine Flotilla had been established, consisting of older submarines.Hezlet later recalled having carried out about fifteen simulated attacks in elderly submarines in the Clyde on various kinds of mainly unsuitable target, following which it was declared he had passed.He found the training to be inadequate preparation.