Scale 1:48. Drawing shows the sections for the O class patrol submarines. Based on the date of the plan, this plan appears to relate to the vessels Orion (1974) and Otama (1975), designed for service in the Royal Australian Navy. The drawing shows the sections at frames 8, 23, 30, 53, 61, 65, 70, 79, 98 and 105 looking forward. The plan also shows the sections at frames 41, 76, 84, 94, 111, 114, 118 and 123 looking aft. A note on this plan states it was unclassified on 18 June 1993. Another note states the plan is sheet number 5 of 5.