Batt Reef is a large reef off Port Douglas – about 18 km long by 5 km wide, lying north-west to south-east and covering about 90 km², according to Wikipedia. Its north-west tip lies 15 km east of Low Isles and Woody Island, and it borders Trinity Passage, the channel linking the inner reef waters of Trinity Bay with the Pacific. The reef is best known for a tragic event.

On 4 September 2006, wildlife presenter Steve Irwin was killed by a stingray barb while snorkelling in shallow water at Batt Reef during filming. The incident drew worldwide attention to the reef, but it is not a regular dive destination. Published dive information is minimal.

The dive.site entry has no description and a single logged dive, and none of the Port Douglas day-boat operators lists Batt Reef among its sites. As a large mid-shelf reef, it can be expected to offer shallow reef flats, sandy lagoons and reef slopes, with typical fish and invertebrate life, including stingrays on the sand – but site-specific details are not documented. Divers wishing to visit would need a private charter or their own vessel, and must check GBRMPA zoning before anchoring or fishing; parts of the reef may be Marine National Park (Green) zone.

Anchoring should be on sand, away from coral, or on public moorings where available. Batt Reef is included here for completeness and because of its notoriety. It suits experienced boat-based divers exploring independently rather than visitors seeking a guided dive, and anyone visiting should treat stingrays with respect: approach slowly, never from above or behind, and give them space.

Boats leave Crystalbrook Superyacht Marina, Wharf Street, Port Douglas (car parking at the marina and on surrounding streets; courtesy pick-ups from Port Douglas and the northern beaches). Chinaman and Rudder reefs are mid-shelf reefs between Low Isles and Opal, reached in roughly 60–75 minutes. They are not on the fixed itineraries of the big day boats; small-group and private operators (ABC Reef Safaris, Scuba IQ/Blue Dive, Tech Dive Academy, OzDive) use them when wind and tide favour them or as a sheltered alternative to the outer reefs.

Entry is by giant stride from the boat at a mooring or anchorage.

Chinaman and Rudder are mid-shelf reefs, partly sheltered by the outer reefs from ocean swell but exposed to wind chop in the south-east trades (April–September). They are diveable in moderate winds when outer sites are too rough, but 20–25 knots makes the crossing uncomfortable. Visibility is usually lower than on the ribbon reefs and drops after heavy rain in the wet season (December–April) when river plumes from the Mossman and Daintree push offshore.

Stinger season November–May; cyclone season November–April. Tidal currents are moderate; neap tides give the clearest water.

No established site plan. On a charter, choose a sheltered section of reef edge, dive the slope at 6–12 m and return to the anchorage, staying clear of rays resting on the sand.

No scheduled dive operator; occasionally visited on private charters. Dive.site lists Scuba IQ, Blue Dive, ABC Scuba Diving, Poseidon and Tech Dive Academy as operators within 25 km, but none advertises regular Batt Reef trips.