If I am reading you correctly you are saying that the EAS in the right hand column is the local speed of sound (Mach 1) at the pressure altitude in the left hand column.
How do we get from the pressure altitudes that you have quoted, to the EAS values by multiplying by Mach 1?
Yes, the RH column is the speed of sound at that pressure altitude.
I didn't say multiply by Mach 1, I said multiply by Mach Number; i.e. the EAS at say Mach 1.4 at 65000 ft would be 218.4 kts
Perhaps I should have written "you only need to know the pressure altitude to get the speed of sound in kts EAS and then multiply that by Mach Number to get the flight EAS"
CliveL
