American United is a Ranger-class Robert Allan Ltd. designed fireboat built to serve the Massachusetts Port Authority as a replacement to Massport Marine Unit 1, the Howard W. Fitzpatrick. It was scheduled to be placed in service in June 2011, and was delivered October 11, 2011, due to the complexity of the build.
The American United was built by A.F. Theriault and Son Ltd. of Meteghan River, Nova Scotia
The vessel is intended to support Logan Airport firefighting, search and rescue, EMS, and Port Security capability.