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Questions and Answers
Where can additional information about lights not given on charts be found?
Where can additional information about lights not given on charts be found?
- Light Structure Description
- Admiralty Sailing Directions (NP 1 to 72)
- Admiralty List of Lights and Fog Signals (NP 74 to 84) (correct)
- Charts
What is the term for the sequence of light and darkness in a light characteristic?
What is the term for the sequence of light and darkness in a light characteristic?
- Sequence
- Characteristic (correct)
- Period
- Phase
What is a light that shows continuously and steadily without interruption called?
What is a light that shows continuously and steadily without interruption called?
- Alternating light
- Characteristic light
- Fixed light (correct)
- Rhythmic light
What is the term for the time taken to complete one sequence in a rhythmic light?
What is the term for the time taken to complete one sequence in a rhythmic light?
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What is one element of a sequence in a rhythmic light called?
What is one element of a sequence in a rhythmic light called?
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Study Notes
Characteristics of Lights
- Additional information about lights not found on charts can be found in the Admiralty List of Lights and Fog Signals (NP 74 to 84) or the Admiralty Sailing Directions (NP 1 to 72)
- The characteristics of a light are its sequence of light and darkness and, in some cases, its color
- Lights can be divided into three classes: fixed, rhythmic, and alternating
Fixed Lights
- Fixed lights show continuously and steadily without interruption
Rhythmic Lights
- Rhythmic lights show a sequence of intervals of light and darkness
- The whole sequence is repeated at regular intervals
- Terms used to describe rhythmic lights include:
- Period: the time taken to complete one sequence
- Phase: one element of a sequence (e.g. a flash, an eclipse)
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Description
This quiz covers Admiralty List of Lights and Fog Signals, Admiralty Sailing Directions, and characteristics of lights, including sequence and color.
