On 17 July 1920, Underwriter was classified as a harbor tug, YT-44.

Following the end of hostilities, she became a harbor tug at Norfolk and remained so employed for the rest of her Navy career.

Through her lengthy career, she served as a harbor tug, fireboat, cargo transport, training ship, and submarine tender, among other duties.

In any event, it seems probable that the harbor tug saw little, if any, naval service.

Three harbor tugs came alongside, their crews throwing messenger lines to the frigate's sailors.

In the rearward island areas, she continued her duties as a harbor tug and local escort vessel.

Today, only tugboat crews and owners are much aware that the city's harbor tugs have been on strike for the past 170 days.

A dirty harbor tug pushed his submarine's bow around to the north, facing down the channel.

A harbor tug was standing by to help maneuver them from the dock.

Each was built to replace the 64-foot wooden-hulled harbor tugs built during the 1940s.