NATO Sea State 5 — Yellow
8.2–13.1 ft
NATO Sea State 6 — Orange
13.1–19.7 ft
NATO Sea State 7+ — Red
≥ 19.7 ft
Risk uses NATO Sea State (Douglas) significant wave-height thresholds (ft).
Beaufort 5 — Yellow
≥ 6 ft
Beaufort 6 — Orange
≥ 9 ft
Beaufort 7+ — Red
≥ 13 ft
Risk uses Beaufort 5/6/7+ significant wave-height thresholds (ft).