1. Move the map curser to a waypoint, push the Menu button, select the waypoint, and delete it.
2. Go to the Nav menu, Waypoints, Routes, Tracks. Select the waypoint, and choose Delete
3. Same as number 2 and up to Options, Select Multiple and... Delete
4. Same as number 2 up to Options, Select All and... Delete.
5. Go to the Setup menu and Format Nav Directories
4 and 5 will delete everything in the Waypoint library.
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, SOLIX 12 SI, 360, RC-1