I have to keep my waypoints separated by category (on different SD Cards) just because the 1197 slows down with all my waypoints in the unit library at the same time ...

Remember ... Every time the boat moves ... The map moves with you ...and the map is not in the unit memory so the unit loads the map data live from the SD Card ...

This means a new "view" of the map has to be loaded from the map card every time the map moves ...along with the waypoint data that happens to be in that realm of the display border ...

Rickie