Ernie Janes / Abstract photo of Tower Bridge, with blurred motion red bus, London, June 2013. Digitally manipulated.

Jeff Wilson / Royal Navy ship, HMS Endurance, crashing through the waves in the south atlantic ocean, Antarctica, November 2009. Taken on location for the BBC series, Frozen Planet.

Michael Pitts / Maritime archaeologist with a 18lb cannon from the wreck of a British warship HMS Colossus, wrecked 1798. St Mary's Roads, Isles of Scilly, UK, August 2013.

Michael Pitts / Wreck of the MS Antilla, aerial shot. Ship scuttled 10th May 1940. Aruba, Dutch Antillies.

Philip Stephen / Spanish navy tall ship "Juan Sebastián de Elcano" motoring out of Cagliari Harbour, Sardinia. 2008.

Philip Stephen / Dive support vessel "Normand Pioneer" undertaking subsea operations on the North Sea, September 2009.

Philip Stephen / Dive support vessel "Normand Pioneer" on the North Sea, September 2009.

Rick Tomlinson / Navy ship and spectator boats gather for the start of leg one of the 10th Volvo Ocean Race in Alicante, Spain, October 2008. For EDITORIAL USE only.

Rick Tomlinson / Crew on the bridge of Brazilian Navy ship "Grajau" following "Telefonica Blue" rounds the Brazilian island of Fernando de Noronha, during the 10th Volvo Ocean Race (2008-2009), October 23rd 2008. For...

Rick Tomlinson / Man filming "Green Dragon" rounding the Brazilian island of Fernando de Noronha from aboard Brazilian Navy Ship "Grajau", during the 10th Volvo Ocean Race (2008-2009), October 23rd 2008. For EDITORIAL...

Rick Tomlinson / "Green Dragon" rounding the Brazilian island of Fernando de Noronha, viewed from aboard Brazilian Navy Ship "Grajau", during the 10th Volvo Ocean Race (2008-2009), October 23rd 2008. For EDITORIAL USE...

Rick Tomlinson / Photographer Rick Tomlinson sending pictures from the Brazilian Navy Ship "Grajau" of the 10th Volvo Ocean Race 2008-2009, as the boats round the Brazilian island of Fernando de Noronha, October 23rd...