sometimes 1 will be on a 'ducer and the other will be on GPS for waypoints and direction
When you see boats with 2 graphs on the bow how are the hooked up are they linked together or do they have separate transducers one for DV and one for sv Thanks for the help
sometimes 1 will be on a 'ducer and the other will be on GPS for waypoints and direction
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With Lowrance you just connect the transducers to one unit and then connect the two units with an Ethernet cable. If running external GPS receiver you also have to run NMEA network.
A setup like this allows you to select sonar, Structure scan or mapping on either unit.