O class Submarine
Scale 1:48. Plan shows the port inboard profile, looking from starboard of 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. A note on this plan states it was unclassified on 18 June 1993. Another note states the plan is sheet number 2 of 5.