Re: GPS Accuracy - how much is actually needed
Why do you plan on mounting it below decks? It is well sealed and designed for outdoor mounting.
For about the same price as the external NMEA 2000 GPS sensor you could buy a tablet that would give you a remote display from the A67 that is usable below decks. Any Android or iOS tablet will do it.
boats that I sail on regularly: Pearson 28-2, Rondar 505, Yankee 30, Blanchard Junior