Mansfield: Thanks for the info.I still have a query.
Take a typical ILS and RVR equipped runway serving both directions.
RVRs given T/D, Mid and STOP end
Do you agree that the Touchdown tranmissometer at each end will be orientated for the relevant ILS?
MID POINT sensor can be either direction but more commonly that of the most commonly used runway?
Now given that the MID reading will be used for either runway will its reading be different for each runway direction and if so, how is this change in reading derived?
By the same token, are the respective STOP end values modified to allow them to be used for each end?
The original poster had a situation where there were only two transmiss. for R24 (T/D & Mid) It is difficult to envisage a situation where R06 would not have had its own T/D transmiss. (u/s notamed perhaps) and as I see it he was asking whether the MID reading as measured for R06 could be substituted in lieu for T/D (his own manuals allowing?)