New Coast Guard boat capable of 35 miles an hour. Washington, D.C., May 17. One of the fastest things afloat, the new U.S. Coast Guard patrol boat #441 was put thru its paces on the Potomac River today for the benefit of treasure officials. The cruiser, which is one of eight to placed in law enforcement and life-saving service of the Coast Guard, is powered with four 1600 horsepower motors and is capable of doing 35 miles an hour, 5/17/1937