Isochronal Router

Drag Start & Finish. Paste your polar. Pick a model. Compute route, scrub time.

Waypoints

Start lat Start lon Finish lat Finish lon

Model Start now Start at (local)

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

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

GC Distance:–

Route Distance:–

Total Time:–

Avg Speed:–

Tacks/Gybes:–

Start (local):–

ETA (local):–

t:0:00

Lat:–

Lon:–

HDG:–

BSP:–

TWS/TWA:–

≤4 kn

4–6 kn

6–8 kn

8–10 kn

≥10 kn