U-352

On 9 May 1942 the Coast Guard cutter Icarus depth-charged U-352 to the bottom off Morehead City; accounts put her dead at 13 to 15, and the 33 survivors became some of the first German prisoners taken by US forces in the war. The submarine lies listing on clean sand at around 35 m, conning tower recognizable, pressure hull exposed where the outer plating has gone - an unmistakable silhouette that no artificial reef can imitate. She is a war grave in practice and dived as one: look, photograph, take nothing, enter nothing. Amberjack spiral the tower, sand tigers drift past in summer, and the blue Gulf Stream water completes a dive of real historical weight.

その瞬間のために: An authentic U-boat casualty of the Battle of the Atlantic, often in blue 25 m visibility

地形: Type VIIC U-boat listing to starboard on sand, hull largely intact

流れ（カレント）: Gulf Stream influence brings blue water and flow in varying doses; descend the anchor line.

危険生物・リスク: Depth with short no-deco times, current, occasional low-vis days inshore of the Stream.

保全: Treat as a war grave: no penetration, no artifact removal - the site has lost too much to takers already.

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）。