To add to the Boat Art trend, there are many commercial artists that specialize in boat and maritime subjects... I'll try to add to these as I find them.
The Magnolia Framing and Art Gallery in Gautier, MS has Bob Walters as a featured artist. A retired Navy "Top Gun" pilot and TWA captain, Mr. Walters' photographic interests are largely concentrated in the area of coastal wildlife and landscapes. Recently he has moved to digital processing and control every aspect of his creations. Bob Walters has numerous magazine credits including several cover shots for Southwind Magazine.
Danny Hahlbohm is a renouned Christian artist (he painted the Footprints in the Sand that you may have seen before. I wasn't aware that he has quite an extensive array of Christian and Naval/maritime art. His "Above the Sea" gallery has ships and various ocean scenes. Below the Sea has mostly whales and other sea creatures. Check out his many works and some commentary at his Inspired Art web site.
Inspired Art - Spreading the Word of Life... through Art.
Thanks to a Duckworks Magazine mailing list post for pointing me toward this page.
Jan Tiura was the first woman tugboat captain on San Francisco Bay... she has also been active in photography for much of her life. After driving any and all manner of tugs for years, she is making some of her photographs available at photoTIURA... really pretty stuff, much of it seen from the angle of a tug captain.