I see I have opened Pandora's box with my comment that SAOS is from Samos. Sorry I didn't pick up on this early - it's newspaper week so I haven't been on the board for a while - too busy writing about food .
Unlikely though it may seem, for those of you who may be interested, the hot contender for the route currently plied by the Proteus is indeed from Samothrace and I apologise for any confusion my remark may have precipitated.