Endurance in hours from fuelAvailable and fuelBurnPerHr, or undefined
when either input was omitted.
Whether endurance covers the total estimated time enroute, or undefined
when endurance or total ETE could not be computed.
Ordered legs with their wind-corrected timing.
Total great-circle route distance in nautical miles.
Total estimated time enroute in hours, or undefined if any leg could not
be timed (ground speed not positive).
Total fuel required across all legs (same unit as fuelBurnPerHr), or
undefined when no burn rate was given or any leg could not be timed.
Route elements of type unresolved that could not contribute coordinates,
passed through from the distance computation.
Result of computing wind-corrected timing across a parsed flight plan route.