释义 |
Definition of fog signal in English: fog signalnoun A small explosive charge which can be placed on a railway line in fog to be set off by the train as a signal to the driver. Example sentencesExamples - Students were taught how to lay dummy charges and fog signals, then walk away and hide.
- Semaphore flags and fog signals are methods of communication.
- Beavertail has probably seen more types of fog signals than any other New England lighthouse station.
- There was a special felt lined cupboard for storing the detonators for the fog signal charges.
- These vessels, while constrained, are required to sound the same fog signal that would be sounded while underway.
- The light has a nominal range of 22 miles and the fog signal a usual range of 2 miles.
- The air fog signal was replaced by an electric omnidirectional signal controlled by a fog detector.
- Two years later, the original fog signal was replaced by a one and a half story, wood-framed structure.
- Construction began on the fog signal on July 1, 1890, and was completed on October 9 the same year.
- Later various different fog signals were used until 1904 when a compressed air system replaced the old steam-operated signals.
- The fog signal, a 12-inch steam whistle, was attached to the roof of the fog signal building.
- When the automated fog signal was installed the south window was blocked with the fog sensor.
- The original fog signal was a steam whistle, similar to the kind used in locomotives and ships.
- In the 1820s a bell fog signal was apparently introduced at West Quoddy Head Lighthouse in Maine.
- In the background is one of the two new electronic fog signals currently in use at Spring Point.
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