Module plan 

What a route is, before any question of where it lives.

A route is a named, ordered list of waypoints, nothing more. Signal K’s own Route resource carries none of IEC 61174 (RTZ)’s per-leg richness – no per-leg cross-track corridor, planned speed, safety-contour override or rhumb/great-circle choice, only name/description/distance/a line – and no client needs that richness either, recomputing a whole route from one global vessel-settings struct rather than per leg. See crate::signalk’s own doc for the rest of that reasoning.

Structs

Route

A route, in the order its waypoints are sailed.

Waypoint

One waypoint of a route – a position and, optionally, what the mariner calls it, the same pair Signal K’s own coordinatesMeta carries per point.