Two compatible ECHOMAP™ devices connected over the Wi‑Fi^® network can share sonar (Connecting Two Compatible ECHOMAP Devices to Share User Data and Sonar).

If both of the ECHOMAP devices have a transducer connected, each device uses its own sonar source automatically. You can switch the sonar source manually to the other device (Selecting a Sonar Source).

If only one ECHOMAP device has a transducer connected, that device is the sonar source for both devices.