Hmmm our Ray Marine keeps so much track info, when we get to one of Joe's wrecks you can't even see the mark because of all the tracks....
Here's a blog post I found on the Raymarine site that says the limit is 15 which I find hard to believe since we have way more on our Axiom. It also mentions you can store additional tracks on an SD card...
http://forum.raymarine.com/showthread.php?tid=3622
I would double check with Raymarine support and see if adding a SD card would help since it's not totally clear here...
I've called them before and they've always been helpful 1-800-539-5539
