13/TB-13), was launched 4 July 1898 by Wolff and Zwicker, Portland, Oregon.

Based at Mare Island Navy Yard, the pioneer group of torpedo boats, which included Fox, cruised during 1900 only in the immediate area, conducting trials of engines and equipment, and in general, developing their type both in terms of construction and equipment, and tactics.

Between 1901 and 1906, Fox was in the yard for installation of torpedo-firing circuits and other work designed to enhance her capabilities.

After 2 years in reserve, she was recommissioned 23 March 1908, and based at San Diego for intensive training operations with the Pacific Fleet.

While active, she continued her training and experimental operations out of San Diego.