There are two versions of the Navionics+ cards.
The earlier version is 2GB with MSRP of $179. It has no maps.
The current version is 16GB with MSRP of $199. It is preloaded with maps.
Remove the microSD card from the SD adapter to see which one it is.
Market versions of the card are in a hard plastic case.
Humminbird Helix 12 SI, 1198c SI, 1198c SI, ONIX 10 SI NT, 360, RC-1