Elphinstone Reef

Elphinstone is a ridge of reef barely wider than a road, running several hundred meters through open water with nothing around it but blue. Its walls drop sheer on both flanks, upholstered in soft coral and swept by fusilier rivers, while the plateaus at either end gather the traffic that matters: grey reef sharks year-round, and from October into December, oceanic whitetips that cruise the shallows and inspect divers with their pilot-fish escorts in tow. Encounters happen close and demand composure - the surface interval briefing is as important as the dive plan. Between shark passes, the reef itself would justify the trip: hanging gardens, anthias haze, Napoleon wrasse on patrol. It is the deep south's signature dive and a genuine test of drift skills.

您此行的高光时刻: Oceanic whitetips in fall; sheer soft-coral walls; the exposed north plateau in a running current.

地形地貌: A long, narrow offshore ridge with plateaus at each end and walls falling far beyond recreational depth

水流: Current usually splits at the plateaus; drift plans change on the day and negative entries are common.

入水方式: Zodiac drops on the north or south plateau depending on current; day boats run from Marsa Alam jetties and liveaboards pass constantly.

危险因素: Strong current and open-water exposure; bold oceanic whitetips near the surface; depth temptation on walls that keep going.

保育: Shark-conduct rules exist because encounters here are close; baiting is illegal and surface loitering is discouraged.

高氧（Nitrox）: 在此值得使用——各潜点深度落在富氧空气（nitrox）能有效延长免减压时间的区间（前提是持有相应认证）。