After Marine 4 (Full time unit) was disbanded over 20 years ago & the vessel (John Glenn) was sold to Washington DC fire, there was a volunteer fireboat that assisted in the City Island area. If I remember correctly, it was called the 'Sun Cat' & was part of the USCG Aux. program. The vessel & its crew battled many of the water front fires in the area for a good number of years. They also had an FDNY radio on board.