Viz that regularly hits 60m over a wall falling 1,000m into blue-black. Grey reef and silvertip sharks in numbers at the…Viz that regularly hits 60m over a wall falling 1,000m into blue-black. Grey reef and silvertip sharks in numbers at the amphitheatre, hammerheads in the deep, potato cod, and the sheer vertigo of an oceanic atoll wall. Osprey is a seamount rising from the abyssal Coral Sea plain, 120nm from land, protected inside the Coral Sea Marine Park declared in 2018, one of the largest marine reserves in the world. Anchorage: Liveaboard; an isolated atoll in open ocean, no shelter. Hazards: No site-specific hazards noted, brief normally. More