Question: What do yellow vs. red segments mean on my route when there's a wave warning?
Yellow segments indicate a wave direction warning — the route can still be generated even if directional wave height limits are exceeded, since this is treated as a warning rather than a strict safety limit. The associated weather warning icon is also shown in yellow.
Red segments indicate a standard wave height warning (significant wave height exceeding limits) — this is treated as higher risk and is never allowed to exceed the maximum safety limit.
This split exists because treating directional wave height as a strict safety limit could previously produce unrealistic, zig-zag routing. Downgrading it to a warning allows more practical routing while still keeping you informed when conditions need extra attention.