Garmin GPS

With Garmin once you register the GPS serial number to get the initial update if you have the the LMT model which I believe is the only way the RV760 is sold, you will be able to download map updates several times a year when they become available - when you plug the GPS in for an update or to check for updates if a map is available it will tell you. There is an option to download the map to your PC and then install it from their to the GPS and this often runs much faster that downloading directly to the GPS. You can also do both so that you have an map on your pc to use with Garmin's PC routing software (free), Mapsource. Downloading the map to any Garmin (and other GPS units) can take hours, just SOP.

Sites like POI Factory's Garmin forum will have discussions about when the new map updates are due for release during the year.