USS Mecosta USS Mecosta may refer to: Mecosta (YTM-392) a Sassaba-class harbor tug laid down in 1944 and sold in 1981. Mecosta (YTB-818) a Natick-class Large District Harbor Tug List of ships with the same or similar names This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.