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Admiralty Notices to Mariners |
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 Weekly Notices are broadcast at 10:00 and 22:00 UTC every day of the week starting Thursday. Notices are broadcast as soon as they become available by UKHO. In other words, one week ahead of the time they become effective and are available in print.
Mariners can receive scheduled broadcasts for any given weekly Notice to Mariners over a four-week period. Notices to Mariners for the current week are transmitted for five continuous days (Thursday to Monday inclusive). Then they are re-transmitted eight days later on the Tuesday and eight days after than on the Wednesday after that. |
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Tracings are broadcast at 10:00 and 22:00 UTC every day of the week starting Thursday along side the Notices to Mariners.  Mariners can receive scheduled broadcasts for any given weekly tracings over a three-week period. The tracings broadcast schedule follows the one for Notices. Tracings for the current week are transmitted for five continuous days (Thursday to Monday inclusive). Then they are re-transmitted eight days later on the Tuesday and eight days after than on the Wednesday after that. |
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 Weekly Blocks and Notes are included in the broadcast of the Notice to Mariners.
Subscribers who wish to receive Blocks & Notes for Admiralty charts need to subscribe to the weekly broadcast of Admiralty Notices to mariners. |
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A corrections log for all current Admiralty charts is broadcast along side the Admiralty Notices to Mariners. The log provides a comprehensive reference publication for published updates to Admiralty charts. The correction log is broadcast at 10:00 and 22:00 UTC every day of the week starting Thursday along side the Notices to Mariners.  The broadcast schedule for the correction log follows the one for Notices and tracings. The correction log for the current week is transmitted for five continuous days (Thursday to Monday inclusive). Then it is re-transmitted eight days later on the Tuesday and eight days after than on the Wednesday after that. |
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