Hello. I own an Oregon 300.

8 Gb micro sdhc card with:

- CN europe (2 Gb).
- Topo map (2 Gb).
- Bluechart g2 (2 Gb).

Can see all maps.

But at the moment i not able to see the fish chart of bluecharts maps. This is a bad problem actually. The aerial images of G2 are unuseful in the oregon 300. I would like to deactivate them.

An good advice: you can rename the files with easy to remenber names; "CN2010.img" for example. Don't need to be called gmabmap.img...gmapprom.img...