Denti, thanks for the info.
Re 737 operations with 125 RVR, what options does the crew have after a malfunction; and if a manual landing is permitted what is the justification?
I could / should have added to my list of considerations any specific crew procedures when operating with the reduced RVR, e.g. Avro RJ, with 50 ft and 250 RVR minima, in the event of a malfunction below DH the crew can continue for a manual landing. With 50ft, 150 RVR minima, a GA is required for any malfunction.