Originally Posted by sibow
The easy way to do that, is to buy - or download - Garmin HomePort (it is like basecamp and mapsource, but for charts)
If you insert a pendrive or a SDcard with a directory and archive named \GARMIN\gmapsupp.img (being gmapsupp.img a given name for the chart of your choice), you will be able to see everything on pc, it is very nice.
Garmin HomePort v220.127.116.11
Before heading out on the open water, plan your voyage with HomePort — marine trip-planning software╣ that lets you plan and organize routes from the convenience of your computer.
Use your existing BlueChart« preprogrammed card, or transfer the preloaded maps▓ directly from your chartplotter to an SD™ card. Then simply plug the card into your computer's card reader to start planning your voyage.
Navigating waters with no visible landmarks or shallow shorelines can be a daunting task for even the most experienced navigator. With your existing BlueChart data together with HomePort on your computer, you’ll have the ability to view map details such as underwater hazards and hidden obstacles and plan a route to avoid them.
HomePort also offers features such as depth profiles, distance and bearing measurements, and tidal predictions.
Manage Your Data
In addition to managing waypoints, routes and tracks, you can store information from past voyages right on your computer. HomePort will also help you create point-to-point routes, determine fuel usage and estimate your travel time for each leg of your route — saving you time and money.
View Marine Charts
It’s easy to browse and view chart detail on your computer screen and mark waypoints and other points of interest. When finished, send the data to an SD card or proprietary Garmin datacard to load into your compatible Garmin chartplotter or sounder.
HomePort is compatible with BlueChart, BlueChart g2 and BlueChart g2 Vision navigation charts. It is currently only compatible with Windows« operating systems.
╣HomePort software does not include map data, and is only available in English.
▓Inland Lakes software is not compatible with HomePort. If using a device preloaded with Inland Lakes software in conjunction with BlueChart g2 and g2 Vision pre-programmed cards, only the pre-programmed cards are compatible.
•displays both fishing and navigational charts from BlueChart g2 Vision
•allows user to measure distance and bearing on the charts
•displays route/track depth profile
•converts tracks into point-to-point routes (track to route conversion) and specifies the speed for each leg of the route
•provides ETA and arrival times (for each leg) when you create routes
•shows animated playback of data collected on device
•calculates fuel consumption (based on fuel flow data provided by the user)
•exports selected data to Google™ Earth
•displays statistics and graphical information about tide stations, tidal streams and currents
•displays grid lines to show latitude and longitude
•allows you to manage waypoints, routes and tracks
•allows you to view the map north-up, map-up or course-up
•displays celestial information such as sunrise, sunset and moon phase
•displays photos and point-of-interest detail
•supports vector charts
•includes worldwide basemap
•allows multiple map views
Note: HomePort is compatible with Windows« operating systems only. There are no Mac OS« versions at this time.
A 2 GB card will be required if transferring the preloaded map from your chartplotter onto a microSD/SD card for use with HomePort.
◦Windows XP SP2 or Windows Vista or Windows 7
◦Microsoft« .NET Framework 3.5
◦2.0 GHz Pentium 4 or equivalent
◦250 MB disk space
◦1 GB RAM
◦1024 x 768 display
◦video card that supports DirectX 9.0
◦microSD/SD card reader or Garmin proprietary USB card reader