Intercoastal Maritime unit towing a crane barge east past Fort Monroe Hampton VA. She spun the unit in the out going tide (flowing east) to change from a push to a tow configuration. The barge appears to be a US Navy "YD" series unit, but has had the number painted over, maybe she has been sold or surplussed?

http://www.tugboatinformation.com/tug.cfm?id=4805&fs