The Navy retained the name carried by this vessel at the time of her acquisition.
(S. P. 116: tonnage 7 (gross); length 38'0"; beam 8'1"; draft 2'4"; speed 36 miles per hour; armament 2 machine guns)
Bab, a sea-sled type motorboat built in 1917 at Boston, Massachusetts, by Murray & Tregurtha Company, was purchased by the Navy for $1.00 from Milton Wilson of Chicago, Illinois; designated as a section patrol craft, S. P. 116; and delivered on 6 October 1917. Assigned to the Ninth Naval District, Bab patrolled the waters of Lake Michigan until the onset of winter caused her to be laid up.
Eventually judged “not suitable for naval use,” Bab was returned to her owner for the sum of $1.00 on 31 December 1918.