*THE HULL TRUTH is the world's largest FREE network for the discussion of Boating & Fishing. Whether you're researching a new boat, or are a seasoned Captain, you'll find The Hull Truth Boating & Fishing Message Forum contains a wealth of information from Boaters and Sportfishermen around the world.
Welcome to the updated THT!
If you are having trouble signing in, please email email@example.com with your username and we will help you. We thank you for your patience as we help you access the new site!
Random Quote: Yesterday is History, Tomorrow is a mystery, Today is a gift that's why it's called present. "Enjoy life"
You can interface them with NMEA 183 or seatalk. Seatalk is better because it goes in both directions through 1 cable. All you can share is data. They will also transfer waypoints on NMEA between units if you wish.