Originally Posted by
Warped Factor
The current interpretation agreed with CAA/SRG that we're working to is less than 5nm and/or 5,000ft with the absolute proviso that the returns do not touch.WF.
Out of curiosity, what is the IFR v VFR min separation in VMC for Class A and D.
Another one for the engineers. The reasonable failure modes for an altitude encoder. I can imagine it would be quite common for the encoder to be out of calibration by a few hundred feet, however, for larger errors is it likely to be 'just a bit more out' or is it fundamentally wrong? What are the odds of the Mode C being out by 1200 feet as compared to being out by 10000 feet?
Although I understand the rules, it does seem really odd that unknown traffic with Mode C of 2.4 under a 2500 ft TMA ledge is treated as outside controlled airspace and one Mode C of 2.6 needs to have traffic at FL80 to be separated - and Mode A returns are assumed safe unless they are in a zone!