Admiralty Anchor
Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily, so treat everything here as planning ranges.
The site takes its name from an old admiralty-pattern anchor wedged fast into the coral at recreational depth, a relic of some long-forgotten visit that the reef has spent decades absorbing. Around it, Osprey's western rim is carved into tunnels and chimneys that open onto the outer wall, so a single dive strings together cathedral light in the swim-throughs, a portrait stop at the anchor, and a drift along the drop with the blue stretching below. In forty-meter visibility the whole circuit feels weightless, and whitetips dozing in the cuts complete the postcard.
The moment you come for: Historic anchor grown into the reef, light-filled swim-throughs, huge visibility on the wall
Topography: Coral rim on Osprey Reef's western side cut with tunnels and swim-throughs, wall beyond
Know before you splash
Hazards: Overhead sections in the tunnels; check buoyancy and torch before committing.
Nitrox: Worth it here: profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).
Who you'll meet
Grey Reef Shark
Whitetip Reef Shark
Nudibranchs
Green Sea Turtle
Silvertip Shark
Giant Trevally
Clownfish & Anemonefish
Lionfish
Also recorded nearby
"Charted here" species were listed by our editors from the sources on this page. Counts are GBIF occurrence records: observations logged within about 5 km of the charted position since 1990, matched only against the species in our catalogue. They show what has been seen there, not a promise of what you will see.
For photographers
Wide angle: ★★★★★ · Macro: ★★☆☆☆ (editors' 1–5 rating of what this site gives each style of shooting)