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MF = Medium Frequency <\/SPAN><\/P> HF = High Frequency <\/SPAN><\/P> MF and HF Receiver towers which are specifically designated to be monitored by the Marine Communications and Traffic Services (MCTS) who monitor these frequencies for calls from ships. Advertised range of service for MF is 150 nautical miles. Advertised range of service for HF is 800 nautical miles but can vary depending on frequency, the season of the year and by time of day.<\/SPAN><\/P> Depending on the site, it may only be operational at specific times of the year. Information on operational times can be found in the tables contained in this document: <\/SPAN>https://www.ccg-gcc.gc.ca/publications/mcts-sctm/ramn-arnm/index-eng.html<\/SPAN><\/P> MF = Moyenne Fréquence <\/SPAN><\/P> HF = Haute fréquence <\/SPAN><\/P> Les tours de réception MF et HF sont spécifiquement désignées pour être surveillées par les Services de communication et de trafic maritimes (SCTM) qui surveillent ces fréquences pour détecter les appels des navires. La portée annoncée du service en MF est de 150 miles nautiques. La portée annoncée pour la HF est de 800 miles nautiques, mais elle peut varier en fonction de la fréquence, de la saison et de l'heure de la journée.<\/SPAN><\/P> Selon le site, il se peut qu'il ne soit opérationnel qu'à certaines périodes de l'année. Vous trouverez des informations sur les périodes opérationnelles dans les tableaux contenus dans ce document : <\/SPAN>https://www.ccg-gcc.gc.ca/publications/mcts-sctm/ramn-arnm/index-fra.html<\/SPAN><\/SPAN><\/P> <\/P> <\/P><\/DIV><\/DIV><\/DIV>",
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