Difference between revisions of "Usual range of a sound signal"
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[[Category:Alphabetical Index]] | [[Category:Alphabetical Index]] | ||
[[Category:IALA Dictionary 1970-89 Edition]] | [[Category:IALA Dictionary 1970-89 Edition]] | ||
[[Category:IALA Dictionary 2023 Revision]] |
Latest revision as of 12:03, 4 February 2024
3-1-255
The distance at which, in foggy weather, an observer has a 50% probability of hearing a sound signal when he is situated on the wing of a ship's bridge in an ambient noise level (as defined by the I.A.L.A. sub-committee on the rated range of sound signals) which is equal to or greater than that found on 50% of large merchant vessels, propagation between the sound signalling apparatus and the observer being effected in relatively calm weather, with no intervening obstacles.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)