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Cobalt 25 · 06-19-2025, 08:47 AM

I just called the phone number for the store selling the Navionics chip and they said it was NOT compatible with my Garmin 740S unit.

I had a Lake W. chip that provided depths and somehow misplaced it. I'm hoping someone has a used chip I can buy, either from this forum or Ebay.

Replacing my entire GPS system would be undesirable, to say the least.

Any ideas would be appreciated.

06-19-2025, 08:47 AM	#3
Cobalt 25 Senior Member Join Date: Sep 2004 Location: Cape Cod Posts: 226 Thanks: 227 Thanked 36 Times in 20 Posts	I just called the phone number for the store selling the Navionics chip and they said it was NOT compatible with my Garmin 740S unit. I had a Lake W. chip that provided depths and somehow misplaced it. I'm hoping someone has a used chip I can buy, either from this forum or Ebay. Replacing my entire GPS system would be undesirable, to say the least. Any ideas would be appreciated.