Complex sentence: West Marine (WMAR on NASDAQ) is an American Watsonville, California-based boating supply and fishing chain of stores that has over 400 stores nation wide, including BoatU.S. locations although most have been converted to the West Marine name and logo.
Split into simpler sentences: West Marine (WMAR on NASDAQ) is an American company based in Watsonville, California which operates a chain of boating supply and fishing retail stores. They operate over 400 retail stores in North America, including former BoatU.S. locations although most have been converted to the West Marine name and logo.