A former name retained.
(SP-582: dp. 161; l. 140'; b. 18'3" ; dr. 5'; s. 15 k.; a. 2 3-pdr.)
Halcyon II, a yacht, was built by Charles Seabury Gas Engine & Power Co. of Morris Heights, N.Y., in 1907, and was purchased by the Navy in August 1917 from her owner, D. W. Flint of Providence, B.I. She commissioned 15 December 1917 at Boston Navy Yard, Ens. C. P. Jameson, USNRF, in command.
After fitting out, Halcyon II was employed as a section and harbor patrol boat in Boston Harbor. She performed this service until 4 June 1919 when she was rammed and seriously damaged by steamer Bayou, Teohe. Determined by the Navy to be unserviceable, she was struck from the Navy List 31 July 1919 and sold to her former owner 4 December 1919.