I recently had reason to refresh my knowledge of VFR flight limitations and consulted the
classic CAA chart already mentioned:
http://www.caa.co.uk/docs/64/ATS_Classifications.pdf
This has been around for years and years and I wonder if an ommission has been overlooked. Either I am being thick (quite probable) or there is a lack of clarity concerning what rules apply to aircraft below 3000ft at speeds of
greater than 140kts
For classes F and G, if your speed is slower than this, then you can fly down to 1500m forward visibility (this referenced by the * and text below the chart), otherwise you must have 5km viz or more.
For classes B, C, D & E, if you speed is slower than 140kts you can fly down to 5km viz. What applies if your speed is greater than 140kts? This is not stated. Has this been missed off for years/am I the first to query it (unlikely)?
You could guess and say that it goes up to 8km, as is required for flight above FL100. If this were the case, why does it not apply to flight between 3000ft and FL100?
Or, does the speed limitation in these airspace classes not affect the viz at all, and just mean that at speeds greater than 140kts at less than 3000ft, I still only need 5km viz, BUT I must now have 1500m horizontal separation and 1000ft vertical separation from cloud, rather than just being clear?