Meet the site
One Ton, also known as Jacobs Bommie, is listed by Oceanatik as a shore-entry dive to 30 m. Its description is of a bottom with many scattered rock formations covered in algae and corals, clean sand and abundant marine life. Oceanatik rates it for experienced divers and advises beginners to dive with experienced divers or instructors because currents can be unpredictable.
The two names hint at local history. 'Jacob's Bommie' suggests a person, possibly a local fisher or diver, and 'One Ton' may refer to an object or an event; Norfolk's coastal and fishing place names are often drawn from families and incidents, and the island's dive-site names were the subject of an academic study, but the origin of this one is not documented in the sources found.
The dive itself is a mix of sand and bommies. Scattered rock formations on clean sand attract fish from the surrounding open bottom, and the algae and corals on the rock support grazers and the predators that follow them. Norfolk's reef fish include wrasses, parrotfish, morwong, rock cod, moray eels and emperors, and stingrays rest on sand patches around the island.
A shore dive to 30 m with unpredictable currents is not a casual undertaking, particularly on an island with no chamber, so local guidance is strongly recommended. Confirm the entry point, the usual route and the depth before diving; depth fields other than the maximum are left blank.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
One Ton is recorded as Pinnacle/Bommie in Norfolk Island. The listed access is shore. 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.
- Current and timing
- Ask how the operator assesses the current window for the actual route. Historical tide notes are not a departure instruction.
- 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 One Ton 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 One Ton 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
Algae and coral-covered rock formations, abundant reef fish; stingrays on sand (general Norfolk fauna)
Location
A bommie area with scattered rock formations covered in algae and corals on clean sand, to 30 m; listed as a shore entry. Exact position not published.
Facilities nearby
Unknown.
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
oceanatik.comoceanatik.comRecord updated 26 Sept 2026. Source claims are being reviewed.