The Rocks is one of Scuba IQ's Agincourt moorings, described as an easy dive featuring coral boulders along the reef, with reef sharks. It is a beginner-friendly site, used for newer divers and as a relaxed dive for anyone. The reef edge is lined with large coral boulders – massive Porites and other slow-growing corals that form rounded mounds, sometimes several metres high.

Between them are sand channels and smaller coral heads. The boulders host a variety of reef fish, from parrotfish and surgeonfish grazing on algae to damselfish and chromis sheltering in the coral. Look closely at the boulder surfaces for Christmas tree worms, feather-duster worms and small crustaceans.

Reef sharks are the other highlight. Whitetip reef sharks often rest on the sand beside the boulders during the day, and grey reef sharks or blacktips may cruise past. They are not aggressive and usually give divers a wide berth.

The site is shallow and navigation is simple: follow the reef edge out and back. Scuba IQ does not publish depths, but the easy rating suggests most of the dive is in the 5–15 m band. Visibility is typically 15–30 m.

The Rocks is ideal for new divers, discover-scuba participants and anyone looking for a gentle dive with reliable shark sightings. Snorkellers can also enjoy the boulders from the surface. On Scuba IQ's small-group days out of Port Douglas the site is often used for the third dive of the day, when divers want a shallow, low-effort profile after deeper morning dives, and the guide can adapt the route to the group's experience.

Its proximity to the other Scuba IQ moorings means it is easy to combine with Nobody's or Your Place.

Agincourt day boats leave Crystalbrook Superyacht Marina (formerly the Reef Marina) on Wharf Street, Port Douglas, between about 8:00 and 8:30 am. Park in the marina car park or the free all-day street parking around Wharf and Dixie streets; Quicksilver, Poseidon and Calypso also run coach pick-ups from Port Douglas, Palm Cove and northern Cairns beaches. The run to the Agincourt ribbon reefs on the edge of the continental shelf is about 65–70 km north-east and takes roughly 75–90 minutes on the large catamarans (Silversonic is the fastest), longer on small-group boats such as Scuba IQ/Blue Dive.

You gear up on board and giant-stride from the dive deck at a permanent mooring; the skipper picks the sites on the day to suit wind and tide, so a named site is never guaranteed. Boats are back at the marina around 4:30 pm.

Agincourt is an outer ribbon reef on the shelf edge, so it is fully exposed to the south-east trade winds that blow from about April to September. Moorings on the protected western (back-reef) side remain diveable in 15–20 knots, but anything over 25 knots or a 2.5 m+ sea makes the crossing rough and operators may cancel or switch to more sheltered moorings. Calm spells in October–December give the glassiest days and 30 m+ visibility.

The wet season (December–April) brings northerlies, afternoon storms, cyclone risk and occasional reduced visibility after big rain events, although the outer reef is far less affected by run-off than inshore reefs. Marine stingers are present November–May. Tidal currents run along the reef edges and through the gaps between the Agincourt reefs; spring tides strengthen them, so exposed corners are usually dived on the neaps or near slack water.

Follow the reef edge from the mooring at 8–12 m, weaving between the coral boulders and watching for resting reef sharks. Turn at half gas and return a little shallower for the safety stop on the reef top.

Scuba IQ / Blue Dive – small-group Agincourt day trips (max ~20 guests) several days a week; the site names are Scuba IQ's own and may not be used by the larger Quicksilver/Poseidon boats.