I put a sailcomp on my boat in the mid 1980's and it has worked like a champ. The boat was struck by lightening and the compass kept on ticking. My compass was made before the NMEA interface was part of the sailcomp product, and I figured that when the compass died I would get a new one. Still waiting. I don't know about the Racemaster, but my sailcomp is an outstnading product.