Moved Garmin 4208 over added a Lowrance multifunction GPS with a second transducer, added Garmin HD radar and Garmin fuel managment to the 4208 package.Wired in GPS output from the )183 cable for GPS position output to my Coastal Explorer to show the boat position on the laptop via the Coastal Explorer software. Added portable USB type GPS puck velcroed down near the windshield so my laptop running Coastal Explorer can work as a third independent nav device while in cruising mode