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| Foghorn |
When
log closes in, the foghorns begin. They
warn ships of dangerous rocks and shoals.
Perhaps the most familiar kind of foghorn, is the deep, horse bellow of
the foghorn called it “diaphone.”
Diaphone
foghorns are worked by blasts of air, and often sound two-toned blasts. First high, then low, then loud “BUUUOOOoooo”
can be heard up to nine miles away.
Electric
foghorns work much like a horn does on a car.
They make low, honking sounds.
Still
others produce siren, whistle and chime signals. The motion of the waves rock the bell buoy
back and forth to make the bell ring.
The
different kinds of fog signals help us to tell them apart. Each lighthouse or fog signal station is
known by the sound and number of its blasts and by the silences in
between. Some foghorns operate
automatically, switching on and off during bad weather. – Dick Rogers
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