It is unknown whether the man had been on the cruise with anyone else or had been travelling alone.
A container ship used its powerful lights on the water to aid the search last night, but to no avail.
This cruise ship tracker shows the path of the Norwegian Jewel, which turned around and did a number of passes where the passenger was believed to have gone overboard. Image / Cruisin.me
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call police immediately on 111.