The first letter of the Greek alphabet.
(MB: t. 10 (net); 1. 56'; b. 9'6"; dr. 3'6" (aft); s. 11.3 mph.; cpl. 7; a. 1-pdr., 1 mg.)
The second Alpha (SP-586)—a motor yacht built in 1911 at Riverside, R.I., by the Narragansett Bay Yacht Yard—was purchased by the Navy on 19 May 1917 from Mr. Joel Fischer and commissioned that same day.
Assigned to the 2d Naval District section patrol, Alpha patrolled the waters of southern Massachusetts, Rhode Island, and Connecticut. The motorboat served the Navy through the end of World War I and into 1919. Her name was struck from the Navy list on 17 May 1919, and she was sold to Mr. Arthur Palmer of Quincy, Mass., on 28 August 1919.