If you get the error message “Sonar Files Out of Sync” the Humminbird data files have been corrupted. Here are a few suggestions to prevent corrupted files.
The radio hand controller has more range than the data transmission. Keep Sonar EMILY closer when recording data for post processing.
If you loose GPS, stop and restart data saving in the Humminbird Snapshot saving window
Stand off from large steel ships and vertical canyon walls as the data link may experience multi-path and create a data break. If it does stop and restart saving in the Humminbird Snapshot Saving window. OK to be farther away from large vertical surfaces as your sonar will produce better imagery further away from submerged vertical surfaces.