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Questions and Answers
What does the abbreviation 'Fl' stand for when it comes to navigational lights?
Which abbreviation is used for a group of two flashes in navigational lights?
How is a 'long flashing' light abbreviated?
What type of light has the total duration of darkness longer than the duration of light in each period?
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Which abbreviation is used for a quick light with a high frequency of flashes?
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How is a group of two flashes followed by one flash abbreviated in navigational lights?
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Which type of light characteristic is indicated by 'Gp Oc(3) W' in the text?
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What does the abbreviation '10M' refer to in the context of navigational lights?
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What does the abbreviation 'F' indicate about a navigational light?
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What did the IALA do in 1977 regarding maritime buoyage systems?
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If a light characteristic is described as 'Flashing', what can be inferred about its total duration?
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What does the abbreviation '15m' represent in relation to a navigational light?
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What does the prefix 'iso-' mean in 'isophase light'?
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In navigational lights, what does 'Q' indicate?
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What does 'I.Q' stand for in terms of navigational lights?
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Which abbreviation represents a very quick group of flashes with more than 80 and less than 160 per minute?
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What type of light uses appearances of light of two clearly different durations to represent characters in Morse Code?
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In the abbreviation 'Mo.(A)', what does the 'Mo' indicate?
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Study Notes
Navigational Light Abbreviations
- 'Fl' stands for Flashing, indicating a light characteristic with defined flash intervals.
- A group of two flashes in navigational lights is abbreviated as Fl(2).
- 'Long flashing' light is abbreviated as LFl.
- A light with a total duration of darkness longer than its light duration in each cycle is known as a Occulting light.
- A quick light with a high frequency of flashes is indicated by the abbreviation Q.
- A group of two flashes followed by one flash is abbreviated as Fl(2+1).
Light Characteristics and Measurements
- 'Gp Oc(3) W' indicates a navigational light characteristic of Group Occulting with three darkness periods, with a color specification (W for white).
- The abbreviation '10M' refers to a light's range, indicating it can be seen from 10 nautical miles away.
- 'F' indicates a navigational light that is a Fixed light, which does not exhibit any flashing or varying characteristics.
- In 1977, the IALA established standards for maritime buoyage systems to improve navigational safety.
Inferences from Light Characteristics
- A light described as Flashing typically has a short total duration of darkness compared to its light duration.
- The abbreviation '15m' represents the range of visibility at 15 nautical miles for a navigational light.
- The prefix 'iso-' in 'isophase light' means that the light has equal duration of light and darkness.
- In navigational lights, 'Q' stands for Quick light, indicating a rapid flash rate.
- 'I.Q' stands for Isophase Quick, which indicates a quick light with equal intervals of light and darkness.
Morse Code Representation
- A light that uses appearances of light of two clearly different durations to represent characters is known as a Morse Code light.
- In the abbreviation 'Mo.(A)', 'Mo' indicates a Morse Code light, specifically signifying the presence of dots (short signals) and dashes (long signals).
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Description
Test your knowledge on maritime light characteristics, including details such as color, cycle period, height above chart datum, and visibility range. Identify complete light characteristic codes like 'Gp Oc(3) W 10s 15m 10M'.
