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GPS City Q&A » Marine GPS » Is there a Garmin external antenna jack adapter?

Marine GPS (1 reply)

Item

Original Question

Is there a Garmin external antenna jack adapter?

› Garmin GPSMAP 421s Sounder with Dual Frequency Transducer

Author

Reply

scott
Terrace

Original question asked on Jul 27, 2010, 7:50pm

I have a new 421s and the boat I purchased has an external antenna from a Garmin GPS. Is there an adapter to connect them as the connector is a bit different? I an not sure what kind of antenna the external one is.

Jordan GPS City
Calgary, AB

Reply #1 on Jul 28, 2010, 7:11am

Hello Scott,

There is most likely an adapter available from someone. The first thing is to figure out the connection on your boat. Once you know that you can search for a BNC to your connector. Just make sure you get the gender of the connectors right.

** You should not need to use the antenna if your GPS can see the sky without obstructions. I would test the 421S first before buying the adapter **

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