[7] Periscope.
[8] Torpedo or Mine.
[9] Several submarines secured alongside each other to the depot ship.
[10] Periscope.
[11] Crossed anchor. The badge indicating the rating of Petty Officer.
[12] ‘Making’ a switch is switching on. ‘Breaking’ a switch is switching off.
[13] Mines.
[14] Naval Store Officer.
[15] The overhang of the stern.
[16] Senior Naval Officer.