Assigned to the 2nd Naval District, Thetis served on the section patrol in southern New England.

Unlike most of the civilian motorboats the Navy acquired for use during the war, Pompano never received a section patrol (SP) number.

She never received a section patrol (SP) number, but was commissioned as USS Sanda.

The Navy assigned her the section patrol number SP-462 and scheduled her to be taken over from Jones on 12 January 1918.

There she worked with the section patrol, operating out of Detroit and St. Clair, Michigan.

However, while the ship was being fitted out, she was found to be unsuitable for "distant service" and was prepared for duty on section patrol.

No longer needed for naval service, Starboard Unit never received a section patrol (SP) number and was never commissioned.

She never received a section patrol (SP) number.

On 10 September 1919, eight section patrol (SP) boats, including Zigzag, were found dashed to pieces on the seawall.

She operated on section patrol until returned to her owner on 19 December 1918.