Hi keg167l,
> This is new to me. Is it a jepp-only trick, or can you do it on
> the CRP5 too?
>
> Can you expand, please?
You beat me to it! I was going to ask the same question as I would have worked it out thus:
Assume CAS = IAS
CAS is 210 knots
Align -5 C with 14,000 on the Pressure Window of the CRP5
Read off 264 kts TAS on the outer scale against 210 kts CAS on the inner.
No Compressibility Error calculation involved as TAS is under 300 kts.
No need to get involved with Mach numbers with this one... or am I wrong?
This is how I have been going through this type of ATPL Gen Nav question.
Best wishes,
Charlie Zulu.