 A specific display illustrating how the Navy has developed and applied technology to the sea-fighting environment.It includes precision instruments for navigation and gunnery, in addition to examples of naval ordnance ranging from shells and torpedoes to modern guided missiles.This centres on the fin and control centre from one of the Japanese midget submarines that attacked Sydney Harbour on the night of 31 May-1 June 1942, and also includes the Boom Boat belonging to the Maritime Services Board that first raised the alarm.