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Maritime Navigation: Lights and Signals

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Questions and Answers

What is the characteristic of a fixed light?

It has a rhythmic sequence with irregular intervals

It changes colour periodically

It shows a sequence of intervals of light and darkness

It shows a continuous and steady light (correct)

What is the term used to describe the time taken to complete one sequence of a rhythmic light?

Period (correct)

Phase

Sequence

Character

In which publication can you find additional information about lights that is not given on charts?

Admiralty Sailing Directions (NP 1 to 72)

Admiralty List of Lights and Fog Signals (NP 74 to 84) (correct)

Charts

None of the above

What is the term used to describe one element of a rhythmic light sequence, such as a flash or an eclipse?

<p>Phase</p> Signup and view all the answers

How many classes of lights are there?

<p>3</p> Signup and view all the answers

Study Notes

Light Characteristics

Additional information about lights not found on charts can be found in the Admiralty List of Lights and Fog Signals (NP 74 to 84) and the Admiralty Sailing Directions (NP 1 to 72)
The character or characteristic of a light refers to its appearance
Principal characteristics of lights include the sequence of light and darkness and, in some cases, the colour of the light

Classification of Lights

Lights can be divided into three classes: fixed, rhythmic, and alternating
Fixed lights show continuously and steadily without interruption
Rhythmic lights show a sequence of light and darkness, with the whole sequence repeating at regular intervals

Rhythmic Light Elements

Period of a rhythmic light refers to the time taken to complete one sequence
Phase of a rhythmic light refers to one element of a sequence, such as a flash or an eclipse

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Description

This quiz covers the characteristics of lights and signals in maritime navigation, including their sequence, color, and description in Admiralty Lists and Sailing Directions.