USCGC Duane

Few working ships earn a half-century of service as varied as the Duane's. Commissioned in 1936, the 327-foot cutter escorted North Atlantic convoys in the Second World War — taking part with her sister Spencer in the 1943 action that destroyed U-175 and rescuing survivors from the sea — then went on to weather-station duty, Vietnam gunfire support and decades of search-and-rescue and drug interdiction. When she was retired in 1985 she was the oldest active US military vessel afloat. Two years later she was cleaned and sent down south of Molasses Reef, one day after her sister ship Bibb, to seed the Keys' artificial-reef program. The two settled differently: the Bibb lies on her side in deeper water, while the Duane sits perfectly upright at about 37 meters, mast still standing, wheelhouse open to the blue. Bathed in Gulf Stream water, she has grown a vivid crust of sponge and coral and often delivers the clearest, fishiest big-wreck dive in the upper Keys — when the same current that feeds her allows a comfortable descent.

沈没の経緯: Deliberately scuttled as an artificial reef off Key Largo, 27 November 1987.

コンディション: Upright and notably intact, mast and crow's nest standing; among the most photogenic profiles in Florida wreck diving

洞窟貫通（ペネトレーション）: Limited. Open hatches invite a look, but interior spaces are confined and silty; anything past the doorways is for trained wreck divers. オーバーヘッド環境への進入には専門的なトレーニングが必要です——最低限、レック・ダイビング認定資格が必要で、完全貫通には技術的なレック・トレーニングが求められます。

推奨ライセンス: Advanced Open Water

流れ（カレント）: Strong · 透明度: 15–30 m

海洋生物: Great barracuda stack in the current above the mast, horse-eye jacks wheel around the superstructure, goliath grouper visit the hull, and the rails bloom with encrusting sponge and cup corals.

危険生物・リスク: Strong current, depth, and fishing line snagged across the rigging

Within Florida Keys National Marine Sanctuary — mooring buoys only, and artifact removal is prohibited