A 51-year-old man went overboard from a Norwegian cruise ship Thursday during a trip to the Caribbean, and, despite an extensive search, he has not been found.

Norwegian Cruise Line said the man was reported to have fallen off the ship around 3 p.m., while it was sailing from Ocho Rios, Jamaica, to Nassau, Bahamas.

“The authorities were immediately notified, and a search and rescue operation under the guidance and oversight of the Bahamas Rescue Coordination Center went underway,” the cruise…