Hammerhead Point (Rasdhoo Madivaru)

This is the Maldives' classic dawn gamble, run from Rasdhoo, the small satellite atoll on Ari's northeastern shoulder. Divers roll in before sunrise and hang at 25 to 30 meters in open blue, watching down-slope for the silhouettes of scalloped hammerheads rising from deep water where they spend the day. Some mornings deliver a slow parade; plenty deliver nothing but gray reef sharks and eagle rays on the wall as consolation, and honest guides say the odds have thinned compared with decades past. The dive itself — dark water, no reference, buddy discipline — is a skill test worth the alarm clock either way.

その瞬間のために: Dawn blue-water hangs for scalloped hammerheads; wall traffic on the way home

地形: Steep outer wall falling from a channel corner into deep open water

流れ（カレント）: Pre-dawn blue-water descent off the corner of Rasdhoo Atoll's channel; flow can push divers off the drop quickly.

危険生物・リスク: Deep blue-water descents in darkness, no visual reference, and current off the corner.

保全: Sightings are wild and unbaited; nothing is done to attract the sharks.

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）。