(MB: t. 66; l. 96'; b. 15'4"; dr. 4'6"; s. 10.5 k.; cpl. 14; a. 1 3-pdr., 1 1-pdr.)
Shada (SP-580)-a motorboat built in 1908 by George Lawley and Sons-was loaned to the Navy on 3 April 1917 by Mrs. G. W. Sortwell of Boston, Mass.; and commissioned the same day, Ens. Daniel R. Sortwell, USNRF, in command.
During World War I, Shada patrolled in Boston harbor and along the New Hampshire and Maine coasts. She was decommissioned on 2 December 1918 and returned to her owner on 23 April 1919.