OCR Text |
Show Fog Destroys Audibility Dense fog has a peculiar property of reducing or destroying audibility within certain zones. Marine dlsusr;rs along coasts are sometimes due to the fact that sound signals which are plainly plain-ly audible during clear weather cannot he heard within certain zones of silence si-lence when the sounding object Is surrounded sur-rounded by dense fog. A recent example ex-ample Is that of the steamer Siberian Prince which went on the rocks at Bentnlok Island during a dense fog while the fog signal at Race rocks nearby was in operation. Subsequent investigation revealed the fact that the sound of the signal could be heard at this point In clear weather, but not during a dense fog. |