The B in BRTstands for Bluewater. As in Bluewater Racing Team. The boats were built in New Bedford, MA. BRT made 24ft boats with outboards on bracket(s), I/O and Arneson. There was also a 27ft model which was similar to the 27ft Signature.
The manufacture name on the title of my BRT is High Performance. In the 1990's the boats were marketed and sold by the builder of Signature Boats under the High Performance name.