Hastings Wall is the general name for the wall mooring on the edge of Hastings Reef listed by Australian Traveller among the reef's eleven named sites. Hastings is a horseshoe-shaped patch reef of about 10 km², and around its margin the reef drops from shallow flats into deeper water as walls and steep slopes; Divers Den notes walls extending on either side of several of its moorings. Cairns Dive Adventures gives depths of 5-30 m for Hastings with moderate currents and visibility of 15-28 m.

On the wall itself expect hard corals with soft corals, sea fans and whips where the current flows, and fish typical of a Cairns outer-reef edge: fusiliers and surgeonfish in the water column, trevally and small reef sharks along the face, coral trout, cod and sweetlips in the undercuts, and turtles resting on ledges. Humphead parrotfish schools move along the reef in the mornings. Butterflyfish, damsels and giant clams are common on the reef top.

The site suits Open Water divers comfortable with a wall and some current. Because published detail specific to this mooring is thin, divers should follow the day's briefing. The moorings at 1770, Golf Clubs and Pirates Cove, each described by Passions of Paradise, lie on other parts of the same reef and have their own entries.

Along the wall itself, the reef has developed small caves and undercuts, and hard and encrusting corals grow even inside them, which gives the face more texture than a smooth drop-off. The top of the wall at 3-5 m is a good place for the safety stop, with giant clams and anemonefish, while the deeper sections at 20-25 m are where sea fans and larger fish are most likely. Reef Experience, which runs daily trips to Hastings, Saxon and Norman, and the Reef Encounter liveaboard are among the boats that use the Hastings wall moorings, and the site pairs well with a shallow second dive at the Fish Bowl.

Visibility on the edge is usually better than in the lagoon areas, often 20 m or more on a calm, rising tide.

Boat access only. Cairns day boats leave from the Reef Fleet Terminal (1 Spence Street) and the neighbouring Marlin Marina on the city waterfront, with check-in between about 7:00 and 8:00 am; most operators run transfers from city and northern-beaches accommodation, and there is paid parking near the terminal. The run of about 50 km out through Trinity Inlet and across the lagoon to Hastings Reef takes around 75 minutes on a fast catamaran and noticeably longer on slower dive boats or into a south-easterly chop.

The Wall is one of the Hastings moorings used by Reef Experience, Aqua Quest and liveaboards when conditions suit a wall dive. Enter from the stern platform.

The prevailing south-east trade winds (typically 15-25 knots from April to September) are what limit Cairns outer-reef diving: above about 25 knots trips may be cancelled, and exposed eastern moorings are used only in light winds. Summer northerlies are gentler but make north-facing moorings choppy. Box jellyfish and Irukandji are present from about November to May (stinger suits on every dive), and the cyclone season runs November to April, when a system in the Coral Sea can close the reef for days.

Visibility drops after heavy rain and strong winds; spring is usually calmest and clearest. Hastings has moorings on all sides, so there is almost always a sheltered option. Wall sites on the reef edge carry more current than the lagoon moorings and are dived in light to moderate winds.

Descend to 15-18 m on the wall and follow it with the reef on one shoulder, into any current, looking into the undercuts and small caves. Turn at a third of your gas and return shallower along the top of the wall, with a safety stop over the reef edge.

Reef Experience, Aqua Quest and Reef Encounter (liveaboard) – occasional; mooring allocation varies; Hastings is also worked by Reef Experience, Divers Den, Tusa Reef Tours, Aqua Quest, Down Under Cruise & Dive and the Reef Encounter liveaboard; the mooring used on any day is chosen by the skipper according to wind, tide and other boats