The U.S. Navy has some spectacular vessels, from submarines to high speed RIBs. They also have dedicated ports and support facilities worldwide. A practical reality of all of this is that the Navy requires efficient and handy boats to support the warhorses. To meet this requirement John Myers of the naval architect firm Hockema & Whalen and Associates have developed a 30 by 15-foot tug with a 5.5-foot draft. Currently the Navy has 24 of these tugs, designated Work Boat Medium, on order from Modutech Marine Inc. of Tacoma, Wash.