Gun emplacement T3 – a light coastal QF 6-pounder 10 cwt twin gun at Detached Mole North.
There were six of these guns defending the Naval harbour at Gibraltar during WWII, they had a range of 4,710 meters, as follows:-
North Mole North – T1, North Mole South – T2, Detached Mole North – T3, Detached Mole South – T4, South Mole North – T5, South Mole South – T6.
The twin 6pdr gun was the standard AMTB close defence gun used by the British Forces during WW2. The best preserved of these guns is in Esquimalt, Canada.