Chetek (YTB-827) was a United States Navy Natick-class large harbor tug named for Chetek, Wisconsin.

[1] The contract for Chetek was awarded 9 August 1971.

Chetek served as a tug in the 5th Naval District at Norfolk, VA.

Stricken from the Navy List 29 February 1996, Chetek was transferred to the US Army of Corps of Engineers, Buffalo, N.Y., 1 March 1996.

Another source indicates that ex-Chetek was renamed Chetek and at some point sold to Basic Towing, Inc. and renamed Nickelena.