USS Zenith (SP-61) was an armed motorboat that served in the United States Navy as a Section patrol vessel from 1917 to 1918.

type, USS Arawan II (SP-1), entered naval service 27 March 1917.

[3][4][5] The boat was powered by two 400 horsepower, eight cylinder Duesenberg diesel engines with estimated speed of 30 miles per hour at maximum 1,200 revolutions per minute.

[3][4] She was acquired by the U.S. Navy on 21 April 1917 at Philadelphia, Pennsylvania for service as a patrol vessel in World War I.

Assigned to section-patrol duty, Zenith conducted surveillance patrols to protect the harbors and estuaries of the 4th Naval District coastline—Pennsylvania, Delaware, and southern New Jersey—from enemy incursion, primarily against submarine and minelaying operations.