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The
Stevens automatic bell striker
The first automated fog signal system used on
the Great Lakes |
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The
10" steam whistle
First installed as a test at the South Manitou
Island light station, the ten inch steam whistle quickly became the
standard throughout the Great Lakes |
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The
Diaphone fog signal
The diaphone represented such an improvement
over the steam whistle, that all Great Lakes fog signal installations
were eventually converted to diaphones. |
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The
electric diaphragm
First installed during the 1970's, these sound
signals are still in use throughout the lakes. |
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