USCGC Duane

The Duane earned her keep for five decades - Depression-era patrols, WWII convoy escort, a submarine kill, Vietnam service - before the Coast Guard retired her and Key Largo sank her upright in 1987, one of the first purpose-built dive reefs in the Keys. She sits proud on the sand at 36 m with her mast still climbing toward the surface, and because the Gulf Stream sweeps her regularly, she is the fishiest wreck in the upper Keys: barracuda in ranks along the rails, jacks spiraling the mast, goliath groupers in the deckhouse, and reef sharks appearing when the blue water is on. In clear stream water, hanging on the mooring line above her is the best view in Key Largo.

その瞬間のために: An upright, storied cutter in blue Gulf Stream water, barracuda escorts, big grouper

地形: 100 m Coast Guard cutter upright on sand at about 36 m

流れ（カレント）: The most current-exposed of the Key Largo wrecks - trips get called or converted when the Gulf Stream leans in.

危険生物・リスク: Strong current on many days; depth for the full tour; hold the line on ascent and descent.

保全: FKNMS artificial reef; moorings mandatory.

ナイトロックス: ここでは効果的です——このエリアのプロファイルは、ナイトロックスが無減圧潜水時間を有意に延ばせる水深帯にあります（適切なトレーニングを受けていることが前提です）。