What Types of Cards can I get Navionics Charts on?

Navionics® GPS plotter charts are available in microSD/SD and Compact Flash (CF) format.

The MSD/SD format shown below is about the size of a postage stamp and includes a larger SD-size adapter with a smaller, microSD card inserted into the bottom of it. The chart files themselves are saved to the microSD card and the adapter is just an empty shell. Some GPS chart plotters will take the entire SD/MSD combination card and some only have a microSD slot. If your plotter only uses microSD, we recommend keeping the SD adapter in a safe place so it can be used along with the microSD card to do chart updates through the computer. You also want to have it available as it includes the chart code and serial number of your card.

The CF (Compact Flash) card format is a larger card, about the size of 2 SD cards and has two rows of 25 pin holes along one edge.