NAT Fllt Plng.
For North Atlantic Ops. Item 15 of the Flight Plan require:
1. Cruising TAS.
2. Oceanic Entry Point and Mach No.
3. Oceanic Landfall and cruising TAS
What is the reason for wanting to know 3 lots of speeds. Why can't you insert just the Mach No. for the crossing? Why a TAS and a Mach No?