Topic summary
Fog signal
Extracted from the Wikipedia article Foghorn.
Early fog signals
Audible fog signals have been used in one form or another for hundreds of years, initially simply seashell horns, fog bells or gongs struck manually.
Topic summary
Extracted from the Wikipedia article Foghorn.
Audible fog signals have been used in one form or another for hundreds of years, initially simply seashell horns, fog bells or gongs struck manually.