The ferry,
run by Brittany Ferries, was on an overnight crossing from
Portsmouth to the French port of St Malo when the passenger fell in
an area four nautical miles south of the Isle of Wight.
A Solent Coastguard spokesman says an overnight widescale search
by Coastguard vessels, ferries and other craft has ended without
finding anything.
Coastguards say the search was called off just after 6am.
No details of the missing passenger have been released.