Never mind I found the solution.

"Dennis Pogson" wrote in message
...
Larry D Gibbs wrote:
I just purchased the Garmin 276C and I got the Automotive Kit and Blue
Charts. Is there a way to load maps from both sets of software onto
the memory card at the same time or will I need to switch cards when
moving from land to sea and from sea to land?

So long as you have unlock codes for both, they should display OK.