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Old 2nd Aug 2011, 23:10
  #46 (permalink)  
cosmo kramer
 
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I did not mean to sanction indiscriminately flying past MAPt in other procedures. As I wrote, in this exact example, I thought the distance to be so small that it in practical world would be negligible = inside tolerances.

However, I correct myself regarding the fix tolerance after digging up ICAO doc 8168.
While the posted DME tolerance is correct, it was of course wrong that I based the calculations on the DME and not the VOR itself.
When overheading a VOR station the tolerance is actually only "nm = 0.033 x height (in 1000 of feet)". Or in this case 0.033 x 0.412 = 0.014 nm.

Of course it's not correct to wait to observe an increasing DME distance when already having a "from indication". So I admit that the go-around must be initiated immediately upon a "from indication" and hence, the only legal choice is to go below the recommended profile in case the cloud base is at minimum. I edited that above and thank you for making me refresh that point.
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