Great circle versus rhumb line
Why one path minimizes distance while the other holds a constant bearing.
Guide hub
Great Circle Routes, Projections and Airspace
The shortest route on a globe can look surprisingly curved on a flat map. Real flight planning then adds winds, airways, political boundaries and operational restrictions that move the track away from the pure geodesic.
Route geometry
The world's longest flights, mapped
How ultra-long-haul routes arc across polar regions and why projection choice matters.
Azimuthal equidistant map creator
Center a world map on an airport and preserve distance and direction from that point.
Distance and routing methodology
WGS-84 geodesics, route bearings, filed-track allowances and detour calculations.
Airspace and long-haul detours
Airspace avoidance and Russia detours
How avoidance guidance reshapes Europe to East Asia route geometry and operating cost.
Anchorage fuel-stop analysis
Which aircraft can absorb a long polar detour and which missions may need an intermediate stop.
Dated planning guidance
Airspace records are a conservative, authority-sourced planning screen with visible applicability and review dates. They are not live NOTAMs and do not replace operator procedures or current regulatory guidance.
Choose a projection for the question
Mercator is familiar and preserves local angles, but exaggerates high latitudes. Natural Earth and Equal Earth give more balanced global context. Orthographic makes globe geometry intuitive. An azimuthal equidistant projection is especially useful when the question is distance and direction from one airport. Great Circle Pro lets the same route be examined across projections without changing the underlying geodesic.
Plot a route on six projections
Compare great circle and rhumb-line distance, then test wind and airspace sensitivities.