This will get you started:
https://www.google.com/search?q=garmin+276c+mc621&ie=utf-8&oe=utf-8
Bill Bina
On 2/5/2016 8:47 AM, Richard Walter via CnC-List wrote:
Ahoy!
We love our old Garmin 276C. It is time, however, to upgrade. Should
we upgrade our BlueCharts? If so how? Or should we get a new
GPS/chartplotter altogether? We have the Raymarine ST-60s on the boat
already.
We sail NYC to Maine.
Thanks,
Richard
s/v INDIGO
Watch Hill
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