We have a file ".img" from OpenSeaMap, which currently is used for Garmin devices. But we know this .img file contains images as OSM is build from it. We are looking for a software developer / smart person who can get from this .img file the data (images) so we can use this data.
We tried already some available online software such as 7-zip but was not able to unpack it.
You might find a link from [url removed, login to view] - to see which file we are talking about.
We have as budget $50 - $100