Am doing PPL at mo and am studying IAS vs TAS at mo... Just trying to get it right in my head. Is mach similar to TAS in that as you go higher, depending on temp. and pressure alt., it will vary significantly to IAS? Like TAS being important for nav. high up for PPL Mach becomes important for both nav and op. limits(e.g. flaps) high up in commercial aircraft?
Thanks a mil...