When a waypoint is created, the waypoint name is displayed when it is saved.
It will have a WP prefix with no snapshot paired with it, or a S prefix with a paired snapshot.
When you start a recording, a R prefix waypoint is created.
44 Diesel is correct.
Humminbird Helix 12 SI, 1198c SI, 1198c SI, ONIX 10 SI NT, 360, RC-1