west didsblue
Well-Known Member
- Joined
- 2 Oct 2011
- Messages
- 32,410
Not all aircraft installations are the same.I was under the impression that you can 'frig' the mode C altitude if you pull a particular CB, which causes the system to revert to the aircraft pressure setting for reference? Again, that may be inaccurate.
Mode S is required in most airspace anyway and if I remember correctly it usually provides both 1013 referenced and Baro corrected altitude (or just the baro correction that’s been set - can’t remember which). It’s very unlikely that his aircraft wouldn’t have been equipped with a Mode S transponder.
It would not be at all straightforward to frig transponder transmissions.