[CA] AXIOM Navigation Acronym

[Chuck - Raymarine - Moderator]

Tamrow,

Unfortunately, the currently available documentation lacks an Acronyms appendix. BOTW: Bearing: Origin To Waypoint

BOTW is the course angle established from the vessel’s orignal position (when navigating (Go To Waypoint / Cursor position or Follow Route has been commanded) to the waypoint being navigated to. When in the middle of following a route, this will be the bearing of course line of the route leg being navigated). Accordingly, BOTW appears to remain constant in value until the vessel arrives within the arrival circle of the waypoint and navigation then transitions to the next waypoint. BTW (Bearing to Waypoint) BTW will differ from BOTW if the vessel drifts away from the course line.