Operational cut-off limits for diving from a marine vessel

Vessels must be anchored safely and securely. Immediately upon entering the water divers must check that the anchor will hold securely for the duration of their dive, and that no parts of the anchor rope will become damaged by chaffing on coral or reef (consideration must be given here to the fact that conditions, such as tidal currents and wind speed / direction may change throughout a dive, i.e. a boat's position may shift through 180 degrees in a short period of time).

  • Boats less than 6 metres length: Diving on the windward reef edge when wind speeds are in excess of 10 knots and/or significant wave height is in excess of 1.0 metres should not be undertaken. No boating at all should occur on the windward reef edge when wave conditions exceed 1.0m.
  • Boats 6 metres in length or greater: Diving on the windward reef edge when wind speeds are in excess of 15 knots and/or significant wave height is in excess of 1.0 metres should not be undertaken.

Boating and diving outside the reef crest during a Strong Wind Warning is at the manager's discretion. As per the University of Sydney Diving Operations Manual, weather and sea conditions must be evaluated by the Dive Coordinator and discussed with all divers. Attention should be paid to weather and sea conditions beyond the sheltered areas of the reef, such that in the event of a rescue or search operation being required to be conducted at sea, i.e. away from sheltered conditions, it would not impose unsafe conditions for any persons or vessels involved.

No boating or diving operations are to take place outside the reef crest during a Gale Warning issued by the Bureau of Meteorology.

No diving is to take place outside of the lagoon system when surface visibility is less than 100 metres.