A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the control room passage between 69 and 77 stations on the main flat looking to port from inside the galley at 74 station showing locker J containing 'Sound signal and CTGS ignition for oxygen generator'. The locker has sections for stowing 30 ready use rounds for the marine sound signal Mark 1 and 100 oxygen candle ignition cartridges. On the right is locker F containing a 7.62 mm lne throwing rifle, a 1 inch pistol grenade, a grenade launcher, 5 soft nosed line throwing projectiles and 3 line throwing lines. Above this locker is a box containing keys for master flood valve and stowage for the master flood valve spanner. A vertical format negative.