aldis lamp การใช้

• Airport control towers still use Aldis lamps to transmit instructions to aircraft whose radios have failed.
• On the wave leader's boat the Aldis lamps, and loudhailers were sometimes more reliable than 1940s radio equipment.
• In addition to the radio equipment, the wireless operators'compartment carried Aldis lamps as well as international maritime signal flags.
• With land telegraph lines cut, the only contact with the outside world was via light-beam communication, helio by day, and Aldis lamps at night.
• Around 04 : 15, the Germans spotted " Eidsvold ", and " Eidsvold " immediately signalled the leading German destroyer with an aldis lamp.
• Just on 9 : 30pm, Port Kembla harbour signalman Arthur Tremble spotted a vessel at sea to the north-east of the harbour and attempted to make contact with an Aldis lamp.
• At, T-204 paused and signalled " AA "  " identify yourself . " Due to damaged equipment, McGonagle could only reply with " AA " using a handheld Aldis lamp.
• For night communications, the British used some large Aldis lamps, brought inland on railroad cars, and equipped with leaf-type shutters for keying a beam of light into dots and dashes.
• The majority of patrols were flown solo, allowing a token bomb load and a lightweight radio installation to be carried, although convoy escort missions generally carried an observer who could communicate with ships using an Aldis lamp.
• This encouraged Allied commanders to attempt a battalion-sized drop behind enemy lines at Avellino the night after but the hilly terrain made it difficult for the pathfinders'Aldis lamps and radio transmitters and the drop was scattered.
• Some signal lamps are mounted on the mastheads of ships, some small hand-held versions are also used ( e . g ., the'Aldis lamp'); other more powerful versions are mounted on pedestals.
• The contacts could operate an audio oscillator for the study of International Morse Code ( used by radio ), or a sounder for the study of American Morse Code ( used by railroads ), or a light bulb ( Aldis Lamp-used by Navy ship to ship or by Heliograph ).
• The findings were forwarded to the Commander in Chief, Grand Fleet, Admiral David Beatty, who remarked that the incident was " . . . one of those that are inseparable from war ", but deplored the delay in introducing improved signalling facilities on submarines, particularly the substitution of the slow, unreliable and cumbersome cruiser arc lamp with Aldis lamps.