Standby power must restore the equipment within 2 seconds.
The reduced RVR requirement on RWY 27 is due to the better approach lighting facilities provided on the approach path to that runway
Rather than 27 having a reduced RVR, 09 has an increased RVR requirement as there are cliffs immediately before the threshold which mean that there is only a very reduced set of approach lights available. CAT 2 ops require visual contact with three consecutive sets of lateral approach lights and as these do not exist on 09 that runway will never get CAT 2.
I think there is work at present at Jersey to realign taxiways at the 27 end to provide protection for CAT 2 approaches to 27, which should make it a bit easier
I was under the impression that the reworking of the taxiways at the east end of the field was mainly to provide a surface with greater load bearing capacity as at present A320 size aircraft and above have to enter the runway earlier and back track due to both reduced wing clearance and wheel/weight distribution. Isn't this also the area planned for further development, hence need for improved taxiways?
Regards
wizzy