A line of destroyers astern steaming in a choppy sea. A C-Class destroyer passes to port. Two ships pass steaming in the opposite directions. A torpedo is fired. A line of destroyers passes at speed; some of them fire torpedos. The track of the torpedo seen through the water. The torpedos are trapped in a net The training ship 'Seahorse' is seen from a moving boat. The depot ship `HMS Thames' is seen with submarines A11 and A6 alongside.