All you should have to do is install the SD memory card with the converted waypoints from your Lowrance unit or the Exported waypoints from your 1187 unit and power the unit on. When the unit turns on it should recognize the waypoint data on the memory card and load non-duplicate waypoints [Non-duplicate waypoints are those that have either a different name, coordinates or belong in a different group]. You should see a message that XX number of Waypoints, XX tracks and XX Routes have been loaded into the unit. If the waypoints do not load; try powering on the unit first and than install the memory card with the waypoints on it. Either way the waypoint data will still be on the memory card and can be saved to your computer for safe keeping.