(MB: t. 101; 1. 118'0"; b. 15'0"; dr. 5'1" (mean); s 14 k.; cpl.16; a. 1 3-pdr., 1 1-pdr., 2 mg., 1 dcp. (Y gun))
The first Alacrity (SP-206), a motorboat constructed in 1910 at Wilmington Del., by Pusey & Jones, was acquired by the Navy on 28 April 1917 under a free lease from Mr. John H. Blodgett and was placed in commission on 30 May 1917 at Boston, Mass., Ens. Courtland W. Babcock, USNRF, in command.
Assigned to the 1st Naval District section patrol, Alacrity spent World War I conducting patrols from the Boston and Provincetown section bases. Following the armistice in November 1918, the motorboat continued naval service until she was finally returned to her owner on 28 April 1919, the second anniversary of her acquisition. Her name was struck from the Navy list that same day.