I'll have a guess that it's either an old status indicator panel or group of selector switches for equipment at Heathrow:-
Runway 27 Left UPS (Uninterrupted Power Supply - possibly for the runway lighting)
Runway 27 Right UPS ( As above)
Then same again for Runways 09 Left and Right
Not sure about third down on the left, but third down on the right (HRDF) could be High Resolution Direction Finder ?
IRVR South and North (Instrumented Runway Visual Range)
ILS (STH) and (NTH) CAT CHANGE - Switches between ILS Category I and Category II/III ?
27L/09R FFM and 27R/09L FFM - Far Field Monitor. (Monitors the integrity of the ILS signals for Category II/III).
When HD returns he'll probably give a much better explanation.
Last edited by spekesoftly; 8th Jan 2010 at 21:14.