Auriga Bay on Southern Small Detached Reef is described by Dive Pacific as the checkout dive site on a Spirit of Freedom far-north expedition. Checkout dives are the first dive of a trip, used to check weighting, equipment and skills before the more challenging dives, so the site is chosen for its relatively benign conditions. Small Detached Reefs lie on the outer edge of the far-northern shelf.

Scuba Diver Life lists Small Detached among the key reefs on the Raine Island expedition. Auriga Bay, as a sheltered bay, provides calmer water for divers to settle in. Expect typical far-northern reef life – hard and soft corals, reef fish, reef sharks and turtles – in a less demanding setting than the walls and pinnacles that follow later in the trip.

Depths and details are not published. Auriga Bay suits all divers on a far-northern expedition as an introduction to the region. It is visited only a few times a year.

Getting here is itself an expedition: the far-northern reefs lie hundreds of kilometres north of Cairns, are visited by only a handful of liveaboards in the October–December window, and are many hours from medical help, so divers should be current, self-sufficient, carry an SMB and audible signal, and dive conservatively. Expedition itineraries are flexible by design: the skipper selects sites each day according to wind, swell and tide, so a named site may be swapped for a nearby reef, and divers should book expecting the region rather than any single dive.

Liveaboard only – there are no day boats, resorts or public moorings this far north. Mike Ball Dive Expeditions' Spoilsport runs 7-night 'Northern Exposure' expeditions between Cairns (Trinity Wharf) and Horn Island in the Torres Strait each November (northbound and southbound, up to 27 dives), plus a 7-night Far North Coral Sea Exploratory round trip from Cairns in October. Spirit of Freedom runs 7-night far-north expeditions from Cairns in October–December, and Professional Dive Services' MV Kalinda has run longer (13-night) Cairns–Horn Island trips.

Horn Island has daily scheduled flights to Cairns (book separately; allow 24 hours after diving before flying). The far-northern reefs are roughly 500–650 km north of Cairns – one to two days' steaming each way.

The far-northern reefs are only diveable in a narrow weather window. The south-east trades blow hard from about April to September and make the long open-water passage and the exposed outer walls impractical, so expeditions run in the transition period, typically October–December, when winds are lighter; the northerly monsoon, storms and cyclones (December–April) close the season. Even in the window, exposed shelf-edge walls (Tijou, Great Detached, Raine) need calm days, and skippers switch between reefs to find shelter.

Strong tidal currents and upwellings run along the continental shelf and through reef openings – channel sites are timed to slack water. Visibility varies from about 12 m to 40 m+ depending on tides and any rain. Marine stingers are present from November.

Used as a checkout dive: descend to 10–12 m, complete weighting and skills checks with the guide, then explore the reef at a comfortable depth before a safety stop.

Liveaboard only: Mike Ball Dive Expeditions (Spoilsport – 7-night Northern Exposure Cairns↔Horn Island, November; 7-night Far North Coral Sea Exploratory, October); Spirit of Freedom (7-night far-north expeditions, October–December); Professional Dive Services MV Kalinda (occasional long expeditions). Requirements typically Advanced certification or 15+ logged ocean dives.