Raymarine RayStar Battery Replacement

Tom Brantigan
C387 #96 Toccata in Sea

The only reason to write this is that it was a surprise to me that it needed to be done and turned out to be so easy.  The problem was that my Raymarine C80 chart plotter took forever to find its GPS location.  From another association member, I learned that there is a battery inside that needs periodic replacement.  The battery evidently stores the last known location so has a place to start when finding itself next time.

It is easy to do, too.

Step 1:

On my boat the GPS antenna is mounted on the transom with two threaded screws easily removed.  There was an adhesive gasket also holding it to the transom and this needs to be dislodged.

Step 2:

Remove the 6 small screws from the underside of the antenna and then carefully pry up the bottom plate of the

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