Apart From Providing Light, What Good Is Provided By A Lighthouse?
Answer:
When fog or other weather conditions obscure the powerful lights, the lighthouse still have sound to give. Landlubbers may not appreciate the monotonous boom of the foghorns, but it is sweet music to those enveloped in the eerie fog over a pitch-black sea. The lighthouse warden gives three blasts of four seconds' duration each, and then remains silence for seventeen seconds. These blasts will pierce the stillness of a foggy night to a distance of seventeen miles.
Modern lighthouses also use radio beacons. Each lighthouses have his own radio or Morse code to identify who and where he is. Radio signals can be picked up by radio-equipped vessels up to a distance of fifty-four miles. By taking a reading or comparison with any other signal they can determine, inwardly half a mile or so, exactly where the lighthouse is. The lighthouse sends out code every twenty seconds. When discouraging weather requires it, they beam out their signal every five seconds.
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