The Abnaki-class tug is a class of United States Navy fleet ocean tugs which began construction in November 1942. Comprising 22 oceangoing tugboats, the class was constructed in response to the needs of World War II, but members of the class served in the Korean War and Vietnam War as well. The United States Navy no longer has any ships of this class in active duty.

The Cherokee class of fleet tugboats, originally known as the Navajo class, were built for the United States Navy prior to the start of World War II. They represented a radical departure from previous ocean-going tug designs, and were far more capable of extended open ocean travel than their predecessors. This was due in large part to their length of 205 feet (62 m), 38 feet (12 m) beam, and substantial fuel-carrying capacity. They were also the first large surface vessels in the United States Navy to be equipped with Diesel-electric drive.