GRID MORA
Quick question for you airline types.
RAPID D over mountainous terrain. Do you have to cold weather correct GRID MORA. simple YES or NO. But, you must show where it is written and the method for making such a correction if your answer is yes. Use this route as the basis for your answer.
London - Vancouver. RAPID D occurs over Greenland not under radar control. Unable to reach Iceland on HF.
AND.........GO.