A tour company has assured conspiracy theorists nervous about booking a cruise to the island next year not to worry — they’ll get their money back should the vessel disappear in the infamous Bermuda Triangle.

Holiday Maker Travel made the tongue-in-cheek, money-back guarantee for its Bermuda Triangle tour.

Norwegian Cruise Line’s Getaway will be sailing to the island next March on a five-day cruise from New York. Travellers booking through the Holiday Maker Travel agency can enjoy an Ancient Mysteries Cruise.

The agency’s website states: "Don't worry about disappearing on this Bermuda Triangle tour. The tour has a 100 per cent return rate and your money will be refunded in the rare chance you disappear."

Experts will be on board to give presentations about the Triangle mystery, and once Getaway arrives at Dockyard, passengers will be invited to take a twilight trip on a glass-bottom boat.

Describing that excursion, the website states: “You'll set out on this night-time King's Wharf cruise trip as stars shine brightly above you.

“As your tour guide entertains with his or her lively banter, you'll start to notice everything slowly growing darker. All of a sudden — complete darkness.

“And then the lights come on — now the fun truly starts. The glass-bottom boat illuminates the sea with its lights, and you'll get an up-close and personal look at the fish and coral below you. You haven't experienced nightlife like this before.”

The Ancient Mysteries Cruise from March 28 to April 2 will include speakers such as Nick Pope, who is a journalist and worked with the British Ministry of Defence, Peter Robbins and author Nick Redfern.