A 79-year-old cruise ship visitor died on Sunday after slipping into an unresponsive state while snorkelling off the West End.Meyer Shipping confirmed that the man was a US citizen, visiting on the Carnival Fantasy.The victim was part of a tour group and swimming approximately a mile offshore at the time of the incident.Police said the man was taken ashore and attended to by EMTs, but pronounced dead by a physician at 12.55pm.The circumstances are not considered suspicious, but an autopsy is expected.A tour boat operator yesterday called the incident a tragedy, but said he hadn't heard the details of what happened.“Sometimes all the training and the precautions in the world just don't make a difference,” he said.Carnival Cruise Lines said the victim's family was being comforted by a guest care team.The Fantasy, which set out from Charleston, South Carolina, arrived at Dockyard on Saturday.