Just thought I'd mention that you can send in your BlueChart chips to Garmin
for an updated version. They charge half the price of a new chip on an
exchange basis,

Navionics provides the same service and they also go one better. Most
Navionics dealers have the equipment and authorization to update your chart and
you don't have to send it away.
S/V Express 30 "Ringmaster"
"Trains are a winter sport"