Former darts champions Keith Deller and Eric Bristow will be the star attraction on a special P&O Ferries service to Bilbao in October.
The operator announced that the players will take part in a special darts challenge mini-cruise on its Portsmouth to Bilbao ferry route on October 17th.
Bristow won his first of four world titles in 1980 but was beaten by Deller in the 1983 world championship final by six sets to five.
Deller also holds the record for the fastest game of darts ever, hitting 301 in just 97 seconds.
People travelling to Spain on P&O Ferries' Portsmouth to Bilbao ferry service can visit attractions in the European city such as the Guggenheim art gallery, the old town and the fishing village of Castro Urdiales.
P&O Ferries operates crossings every three days on the route, with departures from Portsmouth at 21:15.
The company also provides access to France with its ferries to Calais from Dover, as well as a Liverpool to Dublin ferry route.
Written by Mark Robinson