Navigation Lights Definitions

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Questions and Answers

What type of light arrangement is required for a vessel engaged in trawling at night?

  • No lights are required for a vessel engaged in trawling at night
  • A masthead light abaft of and higher than the all-round green light
  • Two all-round lights in a vertical line, the upper being green and the lower white (correct)
  • Two all-round lights in a vertical line, the upper being red and the lower white

How often must a vessel engaged in fishing operations, other than trawling, sound a signal in restricted visibility?

  • At intervals of not more than 3 minutes
  • At intervals of not more than 2 minutes (correct)
  • No sound signals are required for a vessel engaged in fishing operations, other than trawling, in restricted visibility
  • At intervals of not more than 1 minute

What shape must a vessel engaged in trawling display during the day?

  • Two cones with their apexes together in a vertical line one above the other (correct)
  • A single cone with the apex upwards
  • No shape is required to be displayed by a vessel engaged in trawling during the day
  • A single cone with the apex downwards

What type of light arrangement is required for a vessel engaged in fishing, other than trawling, at night?

<p>Two all-round lights in a vertical line, the upper being red and the lower white (D)</p> Signup and view all the answers

What is the minimum length of a vessel engaged in trawling that is required to exhibit a masthead light abaft of and higher than the all-round green light?

<p>50 m (A)</p> Signup and view all the answers

What lights should a power-driven vessel of 12 m or more in length display?

<p>Masthead light forward, second masthead light abaft or sidelights, sternlight (A)</p> Signup and view all the answers

What should a power-driven vessel do when making way through the water in restricted visibility?

<p>Sound one prolonged blast at intervals of not more than 2 minutes (B)</p> Signup and view all the answers

What should a power-driven vessel underway but stopped and making no way through the water do in terms of sound signals?

<p>Sound two prolonged blasts in succession with an interval of about 2 seconds between them (C)</p> Signup and view all the answers

In a power-driven vessel of less than 20 m in length, where can the sidelights be combined?

<p>On the fore-and-aft centre line of the vessel (A)</p> Signup and view all the answers

What should a vessel do when at anchor according to the text?

<p>Ring the bell rapidly for about 5 seconds (C)</p> Signup and view all the answers

What is the meaning of the term 'sternlight'?

<p>A white light showing an unbroken arc of 135 degrees from the stern (D)</p> Signup and view all the answers

What are the characteristics of a 'towing light'?

<p>A yellow light having the same characteristics as the 'sternlight' (B)</p> Signup and view all the answers

What is the meaning of the term 'all-round light'?

<p>A light showing an unbroken light over an arc of the horizon of 360 degrees (A)</p> Signup and view all the answers

What is the meaning of the term 'flashing light'?

<p>A light flashing at regular intervals of 120 flashes or more per minute (C)</p> Signup and view all the answers

What is the meaning of the term 'short blast'?

<p>A blast of about one second's duration (B)</p> Signup and view all the answers

What is the requirement for sidelights on vessels less than 20 meters in length?

<p>Sidelights must be fitted with inboard matt black screens to meet 'Horizontal Sectors' requirements (D)</p> Signup and view all the answers

Flashcards

Trawling Light Arrangement (Night)

Two all-round lights in a vertical line, the upper being green, and the lower white.

Fishing (non-trawling) Signal (Restricted Visibility)

Sound a signal every 2 minutes.

Trawling Shape (Day)

Two cones with apexes together, in a vertical line.

Fishing (non-trawling) Light Arrangement (Night)

Two all-round lights in a vertical line, the upper being red, the lower white.

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Trawling Vessel Length (Masthead Light)

Vessels 50 meters or longer must have a masthead light abaft and above the all-round green light.

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Power Vessel Lights (12m+)

Masthead light, second masthead light or sidelights, and sternlight.

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Power Vessel Signal (Restricted Visibility)

Sound one prolonged blast every 2 minutes.

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Power Vessel Signal (Stopped)

Two prolonged blasts in succession, about 2 sec apart.

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Small Power Vessel Sidelights

Combined on the fore-and-aft centerline for vessels under 20m.

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Anchor Handling Signal

Ring the bell rapidly for about 5 seconds.

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Sternlight Definition

A white light showing a 135-degree arc from the stern.

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Towing Light Characteristics

Yellow light with the same characteristics as the sternlight.

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All-Round Light Definition

A light illuminating a 360-degree arc.

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Flashing Light Definition

A light that flashes repeatedly in 120+ flashes per minute.

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Short Blast Definition

A blast lasting one second.

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Sidelights (Small Vessel)<20m)

Fitted with black inboard screens to meet "Horizontal Sectors" requirements

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