SC 186 was commissioned on 27 April 1918 at New York, and served in the USS Patterson Special Hunting Group.

Subchaser SC 186 tied up alongside other chasers in the Patterson Group.
Subchaser SC 186
Photograph of subchaser SC 286, from the collection of crewman Edmund R. Tatge, Gunner's Mate 2c on SC 245. Courtesy of Bruce Tatge, son of Edmund Tatge.

Context of the above image.
Subchasers in Patterson Group
Photo of chaser, courtesy of Bruce Tatge.