I just bought a new GPSMap 78sc and it comes with Garmin's New Chart Guarantee.
After a month of arguing with Garmin support they finally added the 2022.0 g2 map to my express account.
When I download it there are four .img files from 1Gb->1.5Gb. Only one of the .img files shows up as a chart in Homeport.

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What are the other .img files for? Are they routing information?

iratepirate Reviewed by iratepirate on 28th January 2022. Garmin BlueChart g2 extra .img files I just bought a new GPSMap 78sc and it comes with Garmin's New Chart Guarantee. After a month of arguing with Garmin support they finally added the 2022.0 g2 map to my express account. When I download it there are four .img files from 1Gb->1.5Gb. Only one of the .img files shows up as a chart in Homeport. What are the other .img files for? Are they routing information? Rating: 5