USS Kittiwake

The Kittiwake spent decades standing by for downed submarines (she tended rescue divers and recovered the black box from the Challenger disaster), and retirement suits her. Scuttled in 2011 in bright shallow water, she was prepared almost politely for divers: hatches wide, hazards stripped, five decks of legible spaces from recompression chamber to mess. Storm swell has since rolled her onto her port side, which improved the drama; corridors now run at film-noir angles and the propeller frames divers against blue. Snorkelers read her outline from the surface. Few wrecks anywhere are this generous per bar of pressure.

اللحظة التي جئت من أجلها: Intact rescue-ship spaces at kind depths, tilted corridors and the stern prop, snorkel-visible from the surface.

التضاريس: A 76 m ex-US Navy submarine rescue vessel scuttled in January 2011 on sand, later pushed onto a port list by storm swell.

نقطة الدخول: Moored marine-park site off the north end of Seven Mile Beach; paid entry, buoyed perimeter.

المخاطر: Interior spaces disorient now that floors are walls; penetrate only with training or a guide.

التصاريح والقواعد: Wreck admission fee collected by operators.

الحفاظ على البيئة البحرية: A managed marine-park wreck with an access fee funding maintenance; anchoring is banned and lines stay on the buoys.