Hi folks,
I've got a book ('Northbound Lady' by Karl Peter Ritter, German and English text) describing Lufthansa's MD11F routes EDDF/ESGG-PAFA.
The ESGG-PAFA route takes Polar Track November:
ESGG -D-> SABAK UL997 BBU UM609 TRM PTSN (--NORVA--LABAR=N75E011--N82E011=) NARVI N90E011 (NP!) N85W148 N80W148 N75W148 SCC J115 CQR PAFA.
Well, right over the pole the navigation, especially the autopilot gets into trouble: Only one heading is possible here, ie. South, but which? According to the quote book, MD solved the issue by switching the autopilot to the simplest mode: Keeping the wings level when approaching the poles to 2nm.
Now my question: Is it possible with the MD11 autopilot to set this mode not in the vicinity of the poles? IMU pushing autoflight at least sets heading mode. But how to set wing level actively?
Thanx.