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Français : Montre de station radiotélégraphique internationale. La montre marque l'heure en Temps Universel Coordonné. comme référence.
  • Montre de station radiotélégraphique avec :
  • En rouge les périodes de silence radio de 3 minutes sur la fréquence 500 kHz.
  • Dans le monde, depuis 1999. Les émissions doivent cesser dans la bande comprise entre 495 kHz à 505 kHz durant la période de silence radio.
  • Dans quelques pays appliquant toujours l'ancienne recommandation, les émissions doivent cesser dans une bande comprise entre 490 kHz à 510 kHz durant la période de silence radio.
  • Sur la fréquence 500 kHz, les stations effectuent un silence radio de h + 15 à h + 18 et de h + 45 à h + 48.
  • L’appel de routine, de sécurité et d’urgence est autorisé aux heures de h + 18 à h + 44 et de h + 48 à h + 14 avec un dégagement sur une fréquence de travail.
  • Les radiocommunications pour la détresse sont libres sur la fréquence 500 kHz.
  • En bleu les périodes de silence radio de 3 minutes sur les fréquences: 2174,5 , 2182 kHz et 2187,5 kHz. L'appel de routine, de sécurité, d'urgence est autorisé entre l'heure h + 03 à h + 29 et entre h + 33 à h + 59.
  • Les radiocommunications pour la détresse sont libres.
Date 1 June 2008(2008-06-01)
Source « œuvre personnelle »
Author F1jmm
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EXIF data:
File name heuretu.jpg
Size, Mbytes 0.183619140625
Mime type image/jpeg
Camera manufacturer Canon
Camera model Canon PowerShot A420
Exposure time 1/60 sec (0.016666666666667)
F number f / 2.8
Compressed bits per pixel 3
Exif version 0220
Lens focal length 5.4 mm
Date and time original image was generated 2008:06:01 16:08:42
Date and time image was made digital data 2008:06:01 16:08:42
Meaning of each component 
Shutter speed 5.90625
Aperture 2.96875
Exposure bias 0
Maximum lens aperture 2.96875
Metering mode 5

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