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 time offset (h)

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

Hours Δt (min) Heading step

Upwind no‑go (°) Min turn to count (°) Manoeuvre penalty (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:–