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from which are issued hourly reports on the weather conditions prevailing on the London to Paris, London to Brussels, and London to Amsterdam routes. These are posted on a notice board at the aerodrome and distributed to the various Air Transport Companies and to the Aerodrome wireless station for transmission to machines in the air. Special detail reports to cover any route or time are also issued on demand. Daily forecasts obtained by telephone from the Meteorological Headquarters at the Air Ministry are also issued.

VIII. NIGHT FLYING LIGHTS.
(1) Landing lights.
For the purpose of indicating the proper direction in which machines should take off or land by night, landing lights are provided in accordance with the International Air Convention. These are arranged in the form of two "L's", back to back, the short arms of the "L's" being at right angles to the direction of the wind. 
The lights consist of electric lamps below thick glass covers, flush with the ground, so arranged on the aerodrome that

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