The incident took place at 5:25 a.m. local time off the coast of Finschhafen on Dec. 27, according to the Papua New Guinea National Maritime Safety Authority. All 124 people aboard Coral Expeditions’ Coral Adventurer – including 80 guests and 44 crew members – “were confirmed to be safe, uninjured, and in good health,” the agency said in a Facebook post.

The ship sat on a coral reef at the time of the grounding, but the vessel reported there was no breach of the hull, oil discharge or environmental pollution, and that its anchors and machinery were working.

The Australian Maritime Safety Authority detained Coral Adventurer “based on reasonable suspicion that it is not seaworthy due to potential damage sustained during the grounding, and that it is sub‑standard as a result of failures in the implementation of its Safety Management System under the International Safety Management Code,” according to a Dec. 29 media statement.

The ship remains aground, according to the statement.

Coral Expeditions told USA TODAY in an email that the company is working to refloat the vessel, alongside local authorities. “Acknowledging that we have not been able to deliver the exceptional experience expected by our guests on this occasion, Coral Expeditions has decided to end the tour,” the company added. “All passengers will be flown out on a charter flight.”