USS YMS-328 is a decommissioned US Navy YMS-1-class (YMS-135 subclass) Yard Mine Sweeper (YMS), built in Ballard, Washington at Ballard Marine & Railway in Ballard, Washington (Seattle). She was classified as a Mark II design and her hull is constructed completely out of 3" vertical grain Douglas fir. Sister ships include Jacques Cousteau's RV Calypso. After serving in the Navy in World War II the boat was converted to a private yacht.