NOTAM 10-25-14. Last minute clarifications.
Here are a few matters that might need either emphasis or clarification.
1. A reminder about altitude ceilings.
The London-Melbourne rules sets two ceilings for altitude.
For the Modern Era, pilots must abide by a 18,000 foot hard ceiling. Any violation of the hard ceiling means that the pilot must re-fly the leg. This is true altitude ASL, not pressure altitude, so please leave a margin for error if you select a high cruise altitude.
For the Golden Age aircraft, the normally expected limit is the soft ceiling at 12,000 feet. Again, pilots looking to fly high might cruise at no more than 11,500 feet so as to leave a margin of error due to shifting barometric pressure. Pilots may intentionally fly above 12,000 only when they are...