There are no updates to the LakeMaster region cards ...
New versions are released each year ...which add lakes that were not in the previous version - or may add 1ft contours where 3-10ft contours may have been in the previous version ...
LakeMaster doesn't have the community edits to continually upgrade existing contours as time passes with update-able cards like Navionics ...
If your lake on the LakeMaster card is already listed as Bold* LakeMaster High Definition Survey 1ft contours - that's the best that lake will ever get ...
You can check if your lake is Bold* LakeMaster High Definition Survey here ...
http://www.humminbird.com/Category/Support/Find-a-Lake/
Rickie