Adding Sonar / fish finder to Garmin 742 dual screen

[Tgoertz]

Looking to add a sonar to the garmin 742 on my 25sc. Maps are great but would like actual depth reading and fish finder. Anyone add one and/or have recommendations?

[capn272]

From my understanding you could just add a transducer and it should work as an NMEA2000 device

[capn272]

I was incorrect on this. I just installed a new garmin on mine and got to learn all about it. Hopefully you found your answer... last year.

[alibov]

Looking to add a sonar to the garmin 742 on my 25sc. Maps are great but would like actual depth reading and fish finder. Anyone add one and/or have recommendations?

Here's what I got from Garmin. Works great on my 2021 R5.
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You will need to get a Sonar Module, and an 8-12 pin adapter to plug into this.

If you don't- you will also want two network cables to connect your units to this device.

I will attach all the links below- feel free to take the part numbers and shop around online for the best price.

GCV 10 Scanning Sonar Module
https://www.garmin.com/en-US/p/131717/pn/010-01156-10

8-Pin Transducer to 12-Pin Sounder Adapter Cable
https://www.garmin.com/en-US/p/511579/pn/010-12122-10

Garmin Marine Network Cables (you will want to choose what length you are needing)
https://www.garmin.com/en-US/p/1132/pn/010-10550-00
****

[AsLan7]

Looking to add a sonar to the garmin 742 on my 25sc. Maps are great but would like actual depth reading and fish finder. Anyone add one and/or have recommendations?

Here's what I got from Garmin. Works great on my 2021 R5.
****
You will need to get a Sonar Module, and an 8-12 pin adapter to plug into this.

If you don't- you will also want two network cables to connect your units to this device.

I will attach all the links below- feel free to take the part numbers and shop around online for the best price.

GCV 10 Scanning Sonar Module
https://www.garmin.com/en-US/p/131717/pn/010-01156-10

8-Pin Transducer to 12-Pin Sounder Adapter Cable
https://www.garmin.com/en-US/p/511579/pn/010-12122-10

Garmin Marine Network Cables (you will want to choose what length you are needing)
https://www.garmin.com/en-US/p/1132/pn/010-10550-00
****

.
That's great info alibov! Thanks for posting.

Any pics of your Cobalt? So glad you found us.

And welcome aboard mate!

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