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Efficient Sound Signaling: Navigational Guidelines at Sea

Understand the importance of using sound signals correctly to avoid confusion and ensure safety at sea. Learn about the proper procedures and regulations to follow during foggy conditions. Make use of single letter signals only in emergencies and avoid misuse. Follow recommended intervals when repeating signals to prevent misunderstandings. Stay alert and mindful of signaling etiquette in navigational waters.

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Efficient Sound Signaling: Navigational Guidelines at Sea

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  1. SOUND SIGNALING

  2. 1. Owing to the nature of the apparatus used (whistle, siren, foghorn, etc.) sound signaling is necessarily slow. Moreover, the misuse of sound signaling is of a nature to create serious confusion at sea. Sound signaling in fog should therefore be reduced to a minimum. Signals other than the single letter signals should be used only in extreme emergency and never in frequented navigational waters.

  3. 2. The signals should be made slowly and clearly. They may be repeated, if necessary, but at sufficiently long intervals to ensure that no confusion can arise and that one letter signals cannot be mistaken as two-letter groups. Bell Sound

  4. Alter to Starboard – 1 short blasts

  5. 3. Masters are reminded that the one letter signals of the Code, such as “I, E, S, etc.”, when made by sound, may only be made in compliance with the requirements of the International Regulations for Preventing Collisions at Sea. Reference is also made to the single letter signals provided for exclusive use between an icebreaker and assisted vessels.

  6. "short blast" means a blast of about one seconds’ duration. "prolonged blast" means a blast of from four to six seconds' duration.

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