Nuclear submarine HMS Turbulent had a chance to plumb the depths on her most recent deployment east of Suez.

The Trafalgar-class boat passed over Challenger Deep in the Pacific, the deepest part of any ocean in the world.

At that point there was 10,909 metres of water beneath her hull – far beyond the limit of any submarine.

Since sailing from Devonport in June last year, Turbulent has visited a number of ports, including Souda Bay in Crete and Singapore.

She also visited the US territory of Guam – the first visit by a British submarine in five years – and the British Indian Ocean Territory of Diego Garcia.

Turbulent, which is expected back in UK waters in the near future, spent part of her deployment on Operation Veritas, the global fight against terrorism.