EDTO Flight Planner: Circles, Coverage, ETPs and Weather
Draw the diversion circles around your en-route alternates, check that your route stays inside them, see the equal time points and compare live METAR and TAF with your minima. Learn the basics in the EDTO guide.
Training tool. It measures distance and compares weather with the minima you enter. It does not check airport status, rescue and firefighting category, MEL, fuel or your approval, and EDTO weather minima depend on your authority and the approach at each airport, not on the aircraft type. Real EDTO planning uses your aircraft's approved one-engine-inoperative speed and your State's rules.
How it works
- Diversion distance = (one-engine-inoperative speed + wind component) × diversion time. With no wind this is still-air distance, the basis ICAO uses for the approval.
- The route is sampled every 5 NM along the great circle. At each point the tool finds the nearest alternate.
- Points farther than the threshold distance from every alternate are the EDTO portion of the route. Points beyond the diversion distance are not covered, and show in red.
Colours: grey means within the threshold distance of an alternate, green means EDTO but covered, red means not covered by your diversion time.
Related guides
- EDTO Explained: Extended Diversion Time Operations from Scratch
- EDTO Approval and Dispatch Requirements Explained
- Adequate vs Suitable Aerodrome: What Is the Difference?
- How to Calculate an Equal Time Point (ETP)
- Polar Routes Explained: What Is Special About Flying Near the Poles
- Polar Operations Requirements Checklist (FAA)