Isochronal Router

Windy overlay (optional) • Land & no‑go avoidance • Multi‑model

Waypoints

Start lat Start lon Finish lat Finish lon

Weather

Windy overlay & time sync Overlay model ECMWF (routing) GFS (routing) ICON (routing) Animate model Start now Start at (local)

Boat Polar

Supported: TWS,TWA,BSP or TWA,BSP. Interpolated over TWA and TWS.

Safety

Show land mask Coastal buffer (nm) Show no‑go areas Upload no‑go (GeoJSON)

Land mask: loading…

Routing

Fast mode (recommended)

Upwind no‑go (°) Min turn to count (°) Manoeuvre penalty (min) Heading step (°) Δt (min)

Model Data Window

Computed after routing…

Time Slider

t:0:00

Lat:–

Lon:–

HDG:–

BSP:–

TWS/TWA:–

≤4 kn

4–6 kn

6–8 kn

8–10 kn

≥10 kn

ECMWF

GFS

ICON

Windy: init… (key baked)