Selcal Success
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Selcal Success
HF is a fact of life for our field of operations. Selcal checks come good sometimes, and other times no joy. Some blokes request ATC to "send a longer signal" after a failed Selcal check. Viola! This seems to work. Any clues as to why, and does this actual phrase have any valid meaning to those working in ATC?
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Haven't come across "longer signal" before. Can't on our equipment, duration of tones preset. Our guys just push a button. I have heard operators send a series of tones and get a response. Don't know if it helped.
Do ATC anywhere directly use HF/SELCAL? Done by FSO's (whats left of them) here.
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I am not an animal, I am an ATC.
Do ATC anywhere directly use HF/SELCAL? Done by FSO's (whats left of them) here.
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I am not an animal, I am an ATC.
PPRuNe Bashaholic
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HF SELCAL is used on the North Atlantic for most of the traffic. Though with datalink and FANS, the number using it should slowly decrease.
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10 West
UK ATC'er
[email protected]
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10 West
UK ATC'er
[email protected]
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Mango 3, a double pulse works sometimes. The system relies on a Heath-Robinson designed system of vibrating reeds which resonate in sympathy with a coded tone. The fist pulsed tone gets the reeds vibrating, the second makes them vibrate that bit more and hopefully enough to trigger the alert.
This was covered by a recent thread in much detail.
This was covered by a recent thread in much detail.
