Hudson Bay
If a particular runway is designated CAT 1 and lets say the RVR is calculated at 550 metres (as published in the AIP which is the same as what is published in the Aerad plates) this RVR is known as "absolute minima" If the RVR is below 550 and an aircraft now commences an approach, after an initial warning ATC will pass the following message
" (Callsign) If you continue the approach and descend below 1000ft above aerodrome level, It is believed that you will be contravening UK legislation and I shall be required to report the facts, acknowledge".
No landing clearance will be given, only advice on traffic and wx conditions.
This absolute minima applies to any approach whether it be visual or instrument.
To conclude, if you pass 1000ft and the RVR reported is below the absolute minima for that runway you will be reported for breaking the law.
Would this approach ban speech be given if the RVR dropped below minima once established on the approach but before the 1000ft AGL check?
After passing 1000ft AGL if the RVR dropped below minima and the pilot continued to DA/MDA made visual contact. Would you still refuse the clearance to land and if so what RT phraseology would be used to indicate that it is safe to land?
My understanding was we could continue to land after passing 1000ft AGL assuming adequate visual reference is maintained at DA/MDA?
Thank You,
Johnny