Michael Pitts / Diver on the wreck of the US Submarine tender USS Macaw, sunk in the World War II due to a navigation error, Midway atoll, Pacific Ocean. Model released.

Jeff Rotman / DeepSee diving submersible at water's surface, being towed, Cocos Island, Costa Rica, Pacific Ocean. Property released Model released.

Jeff Rotman / DeepSee diving submersible, Cocos Island, Costa Rica, Pacific Ocean Property released

Alex Mustard / Diver swimming through wreck, mess hall of USS Kittiwake, US Military submarine rescue vessel. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea. January, 2018.

Alex Mustard / Diver swimming through wreck, compressor room of USS Kittiwake, US Military submarine rescue vessel. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea. January, 2018.

Alex Mustard / Bow of the USS Kittiwake wreck (US Military submarine rescue vessel) with diver. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Alex Mustard / Hawksbill turtle (Eretmochelys imbricata) with the USS Kittiwake (US Military submarine rescue vessel) wreck. Seven Mile Beach, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Philippe Clement / Lighthouse at the Cap de La Hague and monument in honor of the French Vendemiaire submarine crew, Cotentin peninsula, Lower Normandy, France, October 2015

Alex Mustard / Diver swimming alongside the bow of the USS Kittiwake (US Military submarine rescue vessel) in Grand Cayman, the Cayman Islands, Caribbean Sea. Model released

Michael Pitts / Diver on the bow of U-Boat -U352. Type VIIC sunk off Cape Lookout on the 9th May 1942, North Carolina, USA, September 2013.

Michael Pitts / Diver on the conning tower of U-Boat -U352. Type VIIC sunk off Cape Lookout on the 9th May 1942, North Carolina, USA, September 2013.

Michael Pitts / British S Class submarine 'HMS Stubborn' conning tower, Buggiba, Qawara Point. Malta.