Scale 1:48. A dyeline coloured print of a plan, showing the sections as fitted of the Porpoise class submarine Sealion (1959). A Cammell Laird builder's stamp, dated 30 November 1962 is printed on the drawing. The plan is noted as Sheet 5 of 5. The drawing shows the sections at frames 8, 41, 71, 76, 84, 94, 111, 114, 118 and 123 looking aft. The plan also shows the sections at frames 23, 30, 53, 61, 65, 79, 98 and 105 looking forward.