USS Lipan (ATF-85) - A Fleet Tug of the U.S. Navy, later transferred to the Coast Guard as USCGC Lipan WMEC-85. - http://usslipan.com/
USNS Sioux (T-ATF-171) - Powhatan class tug homeported in San Diego. One of the seven ocean-going fleet tugs operated by the Navy's Military Sealift Command. - http://www.usspower.com/Featured_Ship/sioux.htm