Nav Rules - Lights
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Fishing or trawling day signal
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Distress day signal
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NUC
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RAM
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Hints
- if you see a green or red light underneath the other lights, consider them to be running lights (one of the answers will probably say vessel is 'under way' or 'making way')
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- 2.
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Vessel Not Under Command, Not Making Way
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Vessel Aground
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Restricted in her Ability to Maneuver (RAM)
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Mine Clearing
Correct Answer
A. Vessel Not Under Command, Not Making Way -
- 3.
23(a)
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Power driven vessel - under way - over 50 meters
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Sailing vessel over 12 meters
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Air cushion vessel operating in nondisplacement mode- INTERNATIONAL
Correct Answer
A. Power driven vessel - under way - over 50 metersExplanation
This answer refers to a specific type of vessel that is categorized as a power-driven vessel, meaning it is propelled by mechanical means such as an engine. The vessel is also described as being "under way," which means it is in motion. Additionally, the vessel is stated to be over 50 meters in length. This information suggests that the answer is referring to a larger power-driven vessel that is currently in motion and exceeds a certain length.Rate this question:
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- 4.
23(b)
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Air-cushion vessel in nondisplacement mode
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Air-cushion vessel in displacement mode >50 meters
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Air-cushion vessel in displacement mode
Correct Answer
A. Air-cushion vessel in nondisplacement modeExplanation
The correct answer is "air-cushion vessel in nondisplacement mode". This means that the air-cushion vessel is operating in a mode where it is not displacing water. In this mode, the vessel is supported by a cushion of air, allowing it to hover above the water surface. This mode is typically used for high-speed operations and allows the vessel to travel faster than 50 meters per second.Rate this question:
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- 5.
A WIG craft must display a _________ light ONLY when taking off 23(c)
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All around flashing yellow light
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All around flashing red light
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Masthead light higher than all other lights and a flashing yellow light
Correct Answer
A. All around flashing red lightExplanation
A WIG craft must display a flashing red light only when taking off. This is because a flashing red light is recognized as a signal to indicate caution or danger, which is important during takeoff to alert other vessels or aircraft in the vicinity. The flashing red light helps to ensure the safety of the WIG craft and other vehicles in the area by providing a clear visual signal.Rate this question:
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- 6.
White light with arc of horizon of 225 degrees, and fixed to show light from straight ahead to 22.5 degrees abaft the beam on either side of the vessel 21
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Masthead light
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Stern light
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Anchor Light
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Bow Light
Correct Answer
A. Masthead lightExplanation
The correct answer is Masthead light. A masthead light is a white light that is fixed to show light from straight ahead to 22.5 degrees abaft the beam on either side of the vessel. It is typically mounted at the highest point on a vessel's mast or superstructure. This light is used to indicate the presence and position of a vessel to other vessels in low visibility conditions, such as at night or in foggy weather.Rate this question:
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- 7.
-Yellow flashing light -50-75 flashes per minute -arc of horizon - 180 to 225 degrees -Fixed to show the light from straight ahead to no more than 22.5 degrees abaft the beam
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Special flashing light
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Towing light
Correct Answer
A. Special flashing lightExplanation
The given information describes a yellow flashing light that flashes at a rate of 50-75 times per minute. It has an arc of visibility from 180 to 225 degrees and is fixed to show the light from straight ahead to no more than 22.5 degrees abaft the beam. Based on these characteristics, the light is identified as a special flashing light.Rate this question:
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- 8.
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Power driven vessel, under 50 meters, towing astern, length of tow less than 200 meters
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Power driven vessel, over 50 meters, being towed, length of tow over 200 meters
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Power driven vessel, under 50 meters, towing astern, length of tow over 200 meters
Correct Answer
A. Power driven vessel, under 50 meters, towing astern, length of tow less than 200 metersExplanation
+ 2 mast head lights
+ 1 special flashing light OVER stern lightRate this question:
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- 9.
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Towing astern, towing vessel under 50 meters, tow exceeds 200 meters
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Towing astern, towing vessel over 50 meters, tow less than 200 meters
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Towing an NUC vessel astern, less than 200 meters
Correct Answer
A. Towing astern, towing vessel under 50 meters, tow exceeds 200 meters -
- 10.
Day signal for towing astern over 200 meters
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Single black diamond
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Double black diamond
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Black ball over black diamond
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Double black balls
Correct Answer
A. Single black diamondExplanation
night signal is 3 mast head lights (arc of 180 -225, 22.5 degrees abaft the beam on either side)Rate this question:
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- 11.
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Dredge pipeline
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Vessel engaged in fishing with purse seine gear
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Towing vessel constrained by draft, tow length less than 200 meters
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Vessel Not under command being towed
Correct Answer
A. Dredge pipeline -
- 12.
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Fishing by trawling, gear caught
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Fishing by trawling, captain over board
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Fishing by trawling, constrained by draft
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Fishing other than trawling, gear caught
Correct Answer
A. Fishing by trawling, gear caught -
- 13.
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Fishing by trawling, shooting nets
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Fishing by other than trawling
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Fishing by trawling, hauling nets
Correct Answer
A. Fishing by trawling, shooting netsExplanation
http://www.navcen.uscg.gov/pdf/navRules/Insert_Page150.pdfRate this question:
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- 14.
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Fishing by trawling, hauling nets
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Fishing by trawling, shooting nets
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Fishing by other than trawling
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Vessel restricted in ability to maneuver
Correct Answer
A. Fishing by trawling, hauling netsExplanation
http://www.navcen.uscg.gov/pdf/navRules/Insert_Page150.pdfRate this question:
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- 15.
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Towing alongside, inland waters other than western rivers
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Towing astern, international
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Vessel towing by pushing ahead on inland waters other than western rivers
Correct Answer
A. Towing alongside, inland waters other than western rivers -
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How is the lenght of a tow measured
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measuring from the stern of the towing vessel to the after end of the tow
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Measuring from the bow of the towing vessel to the after end of the tow
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Measuring the length of towing cable used
Correct Answer
A. measuring from the stern of the towing vessel to the after end of the towExplanation
The length of a tow is measured from the stern of the towing vessel to the after end of the tow. This means that the measurement starts from the back of the towing vessel and extends to the furthest point at the back of the towed object. This measurement is important in order to determine the overall length of the tow and ensure that it is within the acceptable limits for safe towing operations.Rate this question:
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- 17.
"Sternlight" means a
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White light placed as nearly as practicable at the stern showing light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel.
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White light with arc of horizon of 225 degrees, and fixed to show light from straight ahead to 22.5 degrees abaft the beam on either side of the vessel
Correct Answer
A. White light placed as nearly as practicable at the stern showing light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel. -
- 18.
This light can be (select all appropriate responses
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Vessel anchored, under 50 meters
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Stern light
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Vessel under 12 meters aground
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Power driven vessel under 7 meters and traveling under 7 knots
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Sailing vessel under 7 meters
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Vessel under oars
Correct Answer(s)
A. Vessel anchored, under 50 meters
A. Stern light
A. Vessel under 12 meters aground
A. Power driven vessel under 7 meters and traveling under 7 knots
A. Sailing vessel under 7 meters
A. Vessel under oarsExplanation
If vessel anchored is over 50 meters, it will add a lower light aft
if vessel anchored is over 100 meters, it will also add deck lightsRate this question:
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- 19.
what type of vessel may use this type of light?
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Sailing vessel under 20m (65 feet)
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Vessel under sail or oar
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Vessel under 7m
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WIG vessel when taking off ONLY
Correct Answer
A. Sailing vessel under 20m (65 feet)Explanation
This type of light may be used by a sailing vessel under 20m (65 feet).Rate this question:
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- 20.
what can this be?
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Starboard side of a vessel under sail
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Starboard side of a vessel
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Even numbered channel marker/ buoy
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Vessel under 7m
Correct Answer
A. Starboard side of a vessel under sailExplanation
The correct answer is the starboard side of a vessel under sail. This refers to the right side of a boat when it is sailing, with the wind coming from behind. It is important for sailors to understand and follow the rules of navigation, including knowing the different sides of a vessel and their significance in order to ensure safe and efficient sailing.Rate this question:
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- 21.
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Sailing vessel under sail and machine power
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Vessel being towed over 200m
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Dracone or other partly submerged object being towed
Correct Answer
A. Sailing vessel under sail and machine power -
- 22.
what can this day signal represent? select all appropriate check boxes
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Dracone being towed
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Power driven vessel towing astern, tow over 200 meters
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Sailing vessel under sail and machine power
Correct Answer(s)
A. Dracone being towed
A. Power driven vessel towing astern, tow over 200 metersExplanation
This day signal can represent three different scenarios. Firstly, it can indicate that the vessel named Dracone is being towed. Secondly, it can signify that a power-driven vessel is towing another vessel astern, and the length of the tow is over 200 meters. Lastly, it can represent a sailing vessel that is using both sail and machine power.Rate this question:
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- 23.
How far is the required visibility range on a MASTHEAD LIGHT on vessels 12 to 50 meters?
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5 miles. If under 20 meters; 3 miles
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6 miles
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15 miles. If under 20 meters; 10 miles
Correct Answer
A. 5 miles. If under 20 meters; 3 milesExplanation
The required visibility range on a masthead light on vessels between 12 to 50 meters is 5 miles. However, if the vessel is under 20 meters, the required visibility range is reduced to 3 miles.Rate this question:
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- 24.
Vessels over 50 meters in length require a masthead light with a range of ___ miles
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20
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6
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14
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5
Correct Answer
A. 6Explanation
Vessels over 50 meters in length require a masthead light with a range of 6 miles. This is because masthead lights are required for larger vessels to ensure their visibility to other ships and to avoid collisions. A range of 6 miles allows the light to be seen from a significant distance, providing ample warning to other vessels in the vicinity.Rate this question:
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- 25.
The range for sidelights, towing lights, and all around lights on vessels over 50 meters
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2 miles
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3 miles
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5 miles
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7 miles
Correct Answer
A. 3 milesExplanation
The correct answer is 3 miles because the range for sidelights, towing lights, and all around lights on vessels over 50 meters is typically required to be visible from a distance of at least 3 miles. This ensures that other vessels can see and identify the larger vessel, promoting safety and preventing collisions in open waters.Rate this question:
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- 26.
INLAND range requirement for special flashing light on all vessels regardless of size.
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2 miles
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5 miles
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8 miles
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13 miles
Correct Answer
A. 2 milesExplanation
The correct answer is 2 miles because the inland range requirement for a special flashing light on all vessels, regardless of size, is 2 miles. This means that the light should be visible from a distance of 2 miles in inland waters.Rate this question:
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- 27.
On vessels less than 12 meters in length the masthead light, towing light, and all around lights must have a range of ___ miles. ; the side lights on vessels under 12 meters must have a range of __ miles
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2 miles ; 1 mile
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1 mile ; 1 mile
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5 miles ; 3 miles
Correct Answer
A. 2 miles ; 1 mileExplanation
on vesselsRate this question:
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- 28.
Degree of visibility - Mastead light
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225º
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112.5º
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360º all around
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87.5º
Correct Answer
A. 225ºExplanation
The correct answer is 225º. This refers to the degree of visibility of the masthead light. The masthead light is a white light located at the highest point on a vessel, typically on the front of the mast. It is used to indicate the presence and position of the vessel to other boats and ships at night or in low visibility conditions. In this case, the masthead light has a visibility range of 225º, meaning it can be seen from the front of the vessel to slightly behind it on the port side.Rate this question:
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- 29.
Degree of visibility - Sidelights
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112.5º
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225º
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360º all around
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90º
Correct Answer
A. 112.5ºExplanation
Sidelights are used to provide visibility to other vessels in low visibility conditions or at night. They are positioned on the sides of a vessel and emit light in a specific arc. The correct answer of 112.5º indicates that the sidelights provide visibility in that particular arc, allowing other vessels to see the vessel from that angle.Rate this question:
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- 30.
Which of these choices distinguishes a power driven vessel over 50 meters
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2 masthead lights
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1 masthead light
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2 all around white lights
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Red all around light over green all around light
Correct Answer
A. 2 masthead lightsExplanation
A power driven vessel over 50 meters is distinguished by having 2 masthead lights. Masthead lights are white lights located on the front of a vessel and are used to indicate the vessel's position and direction of movement. Having 2 masthead lights is a requirement for larger power driven vessels to ensure their visibility and to avoid collisions at sea.Rate this question:
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.png "what type of vessel may use this type of light?")
.png "what can this day signal represent? select all appropriate check boxes")
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Current Version
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Mar 21, 2023Quiz Edited by
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Nov 11, 2011Quiz Created by
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