Traditionally Alaskan cruise vessels are known to make regular stopovers at Bay Ship & Yacht Co.'s Alameda, Calif. shipyard and drydock facility for routine maintenance and repairs. The yard has served as host to clients, such as Special Expedition Marine, which brought in its Sea Bird and Sea Lion vessels before reaching their winter destinations in either Mexico or the Caribbean. Yorktown Clipper, which is owned by Clipper Cruise Lines underwent a major steam boiler refit, while Alaska Sightseeing Cruise West brought its Spirit of '98 for maintenance, as well as Spirit of Endeavour for a habitability retrofit. ecent customers include Red & White Fleet's tour boat Harbor Princess…