A whistle shall be placed as high as practicable on a vessel, in order to reduce interception of the emitted sound by obstructions and also to minimize hearing damage risk to personnel. The sound pressure level of the vessel’s own signal at listening posts shall not exceed 110 dB (A) and so far as practicable should not exceed 100 dB (A).
Le niveau de pression acoustique du propre signal du navire ne doit pas dépasser 110 dB (A) aux postes d’écoute et ne devrait pas, autant que possible, dépasser 100 dB (A).