Meet the site
Deep Six is one of the many named dive sites on Bougainville Reef, the small, isolated Coral Sea reef about 230 km north-east of Cairns and 150 km south of Osprey. It is known only from marinelife.org.au's list of additional Bougainville sites and Mike Ball's itinerary map, and no description of its layout, depth or highlights was found in the sources consulted. The name hints at a deeper dive than most on the reef, but no depth is published.
Bougainville rises from deep water, and almost every site on it combines a shallow reef top with a wall or steep slope that falls hundreds of metres. The reef's other documented sites give a sense of what to expect: The Zoo and Corner Shop are walls with grey reef, whitetip and blacktip sharks, turtles and schools of butterflyfish, unicornfish and snapper; Walmart has a wall crowded with basslets and invertebrates; Crystal Plateau is a hard-coral terrace with giant potato cod; and Dungeons & Dragons is a maze of reef-top caves. Visibility of 20–40 m is typical, and currents are usually mild but can pick up on the corners.
Bougainville usually gets one day on a Mike Ball Coral Sea itinerary, and the crew picks three or four dives from a long list of named sites depending on wind, swell and current. Lesser-known sites such as this one are therefore dived only occasionally, often when conditions rule out the regular moorings or on longer exploratory trips. Given the name, plan conservatively and confirm the maximum depth with the crew before descending. This record is provisional and should be expanded when an operator description becomes available. Divers who find it on their dive plan should ask the crew for the depth profile and highlights, treat it as a wall dive in blue water with the usual attention to depth, and log what they see so that the entry can be improved.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
Deep Six (Bougainville Reef) is recorded as Wall in Coral Sea. The listed access is boat (multi-day/liveaboard). Confirm the actual meeting point, route and permission to visit; a map pin does not establish any of these.
Topics flagged by the stored research
These are questions prompted by the existing notes, not a verified or complete hazard assessment.
- Planned depth
- Confirm the intended route and training requirements; the recorded maximum is not a target.
Historical access notes exist for this record, but have not been independently verified for current use. Request current directions from the operator or site manager rather than following an old entry description.
Questions, answered
Is Deep Six (Bougainville Reef) suitable for my certification?
The record lists Advanced Open Water. That does not establish suitability for every route or day. Share your training, recent experience and equipment needs with the operator and ask about the specific proposed dive.
Can I book Deep Six (Bougainville Reef) through YouDive?
YouDive is an independent research directory. Contact an operator directly to confirm whether it currently runs the trip, the inclusions and the booking terms.
What you might see
Expected Bougainville fauna: grey reef, whitetip and blacktip reef sharks, turtles, snapper, unicornfish, butterflyfish, anthias, Maori wrasse; soft corals and fans
Location
A named dive site on Bougainville Reef (marinelife.org.au's list of additional Bougainville sites and Mike Ball's itinerary map); exact position not published.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
marinelife.org.aumikeball.comRecord updated 26 Sept 2026. Source claims are being reviewed.
