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Quote: Originally Posted by Boatsb Which model garmin? The "tennis ball" is older technology. The last 2 or 3 models don't use it. Mine is a GHC 10. It was installed in about 2016. When you own a 1966 boat, that's "new" to me!
Quote: Originally Posted by Boatsb Which model garmin? The "tennis ball" is older technology. The last 2 or 3 models don't use it. Garmin 1222/1224 touch..... (Not sure which one). Installed 2018/19 not sure from here either.