I have a friend who fished a lake I know, that I'd like to get his depth depth data from. He did not perform sonar logs. However, he did save his Lowrance Trails.

Lowrance USR V3 files do not contain depth for Trails, but as I understand it, USR V4 files DO contain depths for Trail data points.

My question is, since Reefmaster cannot open USR V4 files, how do I get his Lowrance USR V4 file with depths to import into Reefmaster? I tried a test file with GPSBabel with no luck, it contained GPS data points but no depths.

Thank you