Do You Know About The Seas And Vessels? Take This Quiz!

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Quizzes Created: 18 | Total Attempts: 50,523

Questions: 60 | Attempts: 27,334 | Updated: Jun 28, 2024

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Do You Know About The Seas And Vessels? Take This Quiz! - Quiz

For one to operate at sea they must be determined or know how to prevent collisions at sea with other objects. The midterm quiz below is set in a way that they will help you be better prepared for the coming exam. Give it a try and all the best!

Questions and Answers

1.

The sound signal for a vessel operating in astern propulsion is
- A.
  
  Three prolonged blasts
- B.
  
  Two short blasts
- C.
  
  Three short blasts
- D.
  
  One short blast
Correct Answer
C. Three short blasts

Explanation
The sound signal for a vessel operating in astern propulsion is three short blasts. This signal is used to indicate that the vessel is moving in the opposite direction, or going astern. It is an important signal for other vessels in the vicinity to be aware of the vessel's movement and take appropriate action to avoid any potential collisions.

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2.

What dayshape would be exhibited by a vessel aground
- A.
  
  Two black balls
- B.
  
  Three black balls
- C.
  
  One black ball
- D.
  
  Four black balls
Correct Answer
B. Three black balls

Explanation
A vessel aground is a vessel that is stuck or stranded on the ground or a reef. According to the International Regulations for Preventing Collisions at Sea (COLREGs), a vessel aground should exhibit the dayshape of three black balls. This is to indicate to other vessels that the vessel is not under command and is unable to maneuver. The three black balls serve as a warning to other vessels to keep a safe distance and take necessary precautions to avoid a collision.

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3.

Which vessel may carry her sidelights and sternlight in one combined lantern
- A.
  
  A 10 meter sailing vessel
- B.
  
  A 10 meter power driven vessel
- C.
  
  A 15 meter vessel propelled by sail and machine
- D.
  
  All of the above
Correct Answer
A. A 10 meter sailing vessel

Explanation
According to the International Regulations for Preventing Collisions at Sea (COLREGs), a sailing vessel of less than 20 meters in length may carry her sidelights and sternlight in one combined lantern carried at or near the top of the mast. This provision applies specifically to sailing vessels and not to power-driven vessels. Therefore, the correct answer is a 10 meter sailing vessel.

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4.

The three all round green lights exhibited at or near the foremast head and attach end of the foreyard, indicate that it is dangerous for another vessel to approach within how many meters from this vessel.
- A.
  
  100 meters
- B.
  
  200 meters
- C.
  
  500 meters
- D.
  
  1000 meters
Correct Answer
D. 1000 meters

Explanation
The three all-round green lights at or near the foremast head and attach end of the foreyard indicate that it is dangerous for another vessel to approach within 1000 meters from this vessel.

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5.

A vessel engaged in fishing must display a light in the direction of any gear extends outward more than 150 meters. The color of this light is:
- A.
  
  Green
- B.
  
  Yellow
- C.
  
  White
- D.
  
  Red
Correct Answer
C. White

Explanation
A vessel engaged in fishing must display a white light in the direction of any gear that extends outward more than 150 meters. This is to ensure that other vessels can see and avoid the fishing gear, reducing the risk of collision. White lights are commonly used to indicate the presence of a vessel, and in this case, it is specifically used to indicate the location of fishing gear.

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6.

Vessel constrained by her draught must exhibit where they can best be seen
- A.
  
  Two all round red lights in a vertical line
- B.
  
  Three all round white lights in a vertical line
- C.
  
  Three all round red lights in a vertical line
- D.
  
  None of the above
Correct Answer
C. Three all round red lights in a vertical line

Explanation
A vessel that is constrained by its draught (the depth of water it requires to safely navigate) must exhibit three all-round red lights in a vertical line. This indicates to other vessels that the constrained vessel is unable to deviate from its course and may require extra space to maneuver. The red lights are easily visible and help other vessels to identify and navigate around the constrained vessel safely.

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7.

When psuhing vessel and a vessel being pushed ahead are rigidly connected in composite unit they shall exhibit the lights for.
- A.
  
  P.D.V.
- B.
  
  Pushing vessel
- C.
  
  Towing vessel
- D.
  
  Any of the above
Correct Answer
A. P.D.V.

Explanation
When a pushing vessel and a vessel being pushed ahead are rigidly connected in a composite unit, they shall exhibit the lights for a Pushing Vessel (P.D.V). This means that both vessels will display the appropriate lights indicating that they are a composite unit engaged in pushing operations. This is important for other vessels to be able to identify and navigate safely around the composite unit.

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8.

A vessel engaged in trawling will show identification lights:
- A.
  
  A green over a white light
- B.
  
  A red over a white light
- C.
  
  A white over a red light
- D.
  
  Two red lights in a vertical line
Correct Answer
A. A green over a white light

Explanation
A vessel engaged in trawling is required to display a green over a white light. This is to indicate to other vessels in the vicinity that the vessel is engaged in fishing activities and has fishing gear in the water. The green light signifies the starboard (right) side of the vessel, while the white light indicates the vessel's presence. This helps other vessels to navigate safely around the trawling vessel and avoid any potential collisions.

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9.

As defined in the navigation rules, a masthead light shows through an arc of how many degrees?
- A.
  
  112.5 degrees
- B.
  
  90 degrees
- C.
  
  225 degrees
- D.
  
  360 degrees
Correct Answer
C. 225 degrees

Explanation
According to the navigation rules, a masthead light is designed to be visible through an arc of 225 degrees. This means that the light can be seen from the front of the vessel to a point slightly behind it, covering a wide range of visibility. This is important for other vessels to determine the position and heading of the vessel displaying the masthead light, ensuring safe navigation and avoiding collisions.

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10.

The masthead light may be located at other than fore and aft centerline of a vessel:
- A.
  
  Less than 20 meters in length
- B.
  
  Engaged in fishing
- C.
  
  Less than 12 meters in length
- D.
  
  Which separate carried on the outward
Correct Answer
C. Less than 12 meters in length

Explanation
The masthead light on a vessel that is less than 12 meters in length can be located at other than the fore and aft centerline. This is in accordance with international navigation and collision regulations. For vessels that are 12 meters or longer, the masthead light is typically required to be on the fore and aft centerline.

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11.

In what instance is the yellow light of the towing vessel is placed above the stern light?
- A.
  
  The vessel being towed is an oil tanker
- B.
  
  The towing vessel has run out of white bulb
- C.
  
  The vessel being towed is a submarine
- D.
  
  The vessel is towing astern
Correct Answer
D. The vessel is towing astern

Explanation
The yellow light of the towing vessel is placed above the stern light when the vessel is towing astern.

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12.

A vessel being towed astern, where the length of the two exceeds 200 meters will exhibit:
- A.
  
  A ball on each end of the tow
- B.
  
  A diamond shape where it can best be seen
- C.
  
  Two balls in a vertical line
- D.
  
  No day shape
Correct Answer
B. A diamond shape where it can best be seen

Explanation
When a vessel is being towed astern, it is required to display a day shape to indicate its status. In this case, if the length of the tow exceeds 200 meters, the day shape displayed will be a diamond shape. This shape is chosen because it provides the best visibility and can be easily recognized by other vessels. Therefore, the correct answer is "a diamond shape where it can best be seen."

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13.

You are approaching a vessel dredging by day and see two balls in vertical line on the port side of the dredge. These shapes mean:
- A.
  
  You should pass on her port side
- B.
  
  She is not under command
- C.
  
  There is an obstruction on her port side
- D.
  
  She is moored
Correct Answer
C. There is an obstruction on her port side

Explanation
The two balls in a vertical line on the port side of the dredge indicate that there is an obstruction on the port side of the vessel. This means that there is something blocking the path or creating a hazard on the left side of the dredge. It is important for approaching vessels to be aware of this obstruction and take necessary precautions to avoid any potential collision or damage.

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14.

A pilot vessel on pilotage duty at night will show sidelights and a sternlight
- A.
  
  Only when making way
- B.
  
  At anytime when underway
- C.
  
  When at anchor
- D.
  
  Only when identifying light
Correct Answer
B. At anytime when underway

Explanation
A pilot vessel on pilotage duty at night will show sidelights and a sternlight at anytime when underway. This is because when a pilot vessel is underway, regardless of the time of day, it is required to display the appropriate navigation lights to indicate its position and direction of travel. Sidelights are displayed on the port (red) and starboard (green) sides of the vessel, while the sternlight is displayed at the rear. These lights help other vessels in the vicinity to determine the pilot vessel's position and take necessary actions to avoid collision.

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15.

Length of vessel, when aground are not required to exhibit the lights prescribed in rule 30 d i and ii
- A.
  
  Less than 7 meters
- B.
  
  Less than 12 meters
- C.
  
  Less than 50 meters
- D.
  
  50 meters and more
Correct Answer
B. Less than 12 meters

Explanation
Vessels that are less than 12 meters in length, when aground, are not required to exhibit the lights prescribed in rule 30 d i and ii. This means that smaller vessels, which are less than 12 meters long, do not need to display specific lights when they are stranded on the ground. The lights mentioned in rule 30 d i and ii are only necessary for vessels that are larger than 12 meters in length.

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16.

The masthead light of a vessel less than 12 meters in length should be visible at:
- A.
  
  3 nautical mile
- B.
  
  1 nautical mile
- C.
  
  2 nautical mile
- D.
  
  4 nautical mile
Correct Answer
C. 2 nautical mile

Explanation
The masthead light of a vessel less than 12 meters in length should be visible at 2 nautical miles. This is in accordance with the International Regulations for Preventing Collisions at Sea (COLREGS), which state that vessels less than 12 meters in length should have a masthead light that is visible for at least 2 nautical miles. This ensures that other vessels can see and identify the smaller vessel from a reasonable distance, promoting safety and preventing collisions at sea.

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17.

In day time a 19 meters vessel underway and fishing with nets or lines, may indicate her occupation by displaying
- A.
  
  A black or white vertically stripped ball
- B.
  
  A basket
- C.
  
  2 black cones apex together
- D.
  
  A black ball
Correct Answer
C. 2 black cones apex together

Explanation
The correct answer is 2 black cones apex together. This is because according to the International Regulations for Preventing Collisions at Sea (COLREGs), a vessel that is underway and fishing with nets or lines during the day should display 2 black cones apex together. This signal indicates to other vessels that the fishing vessel has restricted maneuverability and that other vessels should keep clear to avoid any potential collisions.

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18.

In what condition of visibility may be danger signal be sounded.
- A.
  
  In fog
- B.
  
  Clear visibility
- C.
  
  Zero visibility
- D.
  
  Any condition of visibility
Correct Answer
D. Any condition of visibility

Explanation
In any condition of visibility, a danger signal may be sounded. This means that regardless of whether the visibility is clear, in fog, or even in zero visibility, a danger signal can be used to alert others of potential danger. This emphasizes the importance of using warning signals to ensure the safety of individuals in various visibility conditions.

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19.

You are backing out of a slip in international water and can be seen by an approaching vessel. Which of the following would you give?
- A.
  
  One prolonged blast
- B.
  
  Three short blast
- C.
  
  Three prolonged blast
- D.
  
  One short one prolonged and one short
Correct Answer
B. Three short blast

Explanation
When backing out of a slip in international water and being seen by an approaching vessel, you would give three short blasts. This is a signal to indicate that you are operating in reverse and that the other vessel should proceed with caution. Giving three short blasts is a recognized sound signal for this specific situation and is meant to communicate your intentions and avoid any potential collisions.

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20.

Which statement is true concerning a vessel under oars?
- A.
  
  She must show a stern light
- B.
  
  She must show a fixed all round light
- C.
  
  She is allowed to show the same lights as a sailing vessel
- D.
  
  She must show a day shape of a black cone
Correct Answer
C. She is allowed to show the same lights as a sailing vessel

Explanation
A vessel under oars is allowed to show the same lights as a sailing vessel. This means that it must display the appropriate navigation lights based on its size and maneuverability. These lights include a red and green sidelight, a white stern light, and a white masthead light. By showing these lights, the vessel ensures that it is visible to other vessels and can navigate safely at night or in restricted visibility conditions.

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21.

At sea you sight a vessel displaying a black conical shape, point downward. This would indicate:
- A.
  
  A vessel engaged in fishing
- B.
  
  A power driven vessel
- C.
  
  Both a and b
- D.
  
  Neither a and b
Correct Answer
D. Neither a and b

Explanation
In maritime signaling, a black conical shape pointing downward indicates a "motor sailing vessel." This is a sailboat that is also using its engine for propulsion. The cone shape is used to alert other vessels that, despite having sails, the vessel might be under engine power, impacting navigation and right-of-way rules. This signal differs from fishing vessels, which have separate signaling requirements, and power-driven vessels, which do not typically display this shape. Understanding these maritime signals is crucial for maintaining safety and clarity in marine environments, allowing vessels to navigate and avoid collisions efficiently.

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22.

Which vessel would exhibit sidelights when underway and not making way?
- A.
  
  Vessel not under command
- B.
  
  A pilot vessel
- C.
  
  A vessel engaged in dredging
- D.
  
  A vessel trawling
Correct Answer
D. A vessel trawling

Explanation
Under maritime navigation rules, a vessel that is underway but not making way (i.e., it is afloat but not moving through the water) typically does not exhibit sidelights. However, a vessel trawling (engaged in fishing operations with nets) will display its sidelights and a sternlight even if it is not making way, to indicate its operations and alert other vessels of its presence and restricted maneuverability. Therefore, the correct answer is a vessel trawling.

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23.

Two all round red lights displayed in a vertical line are shown by a:
- A.
  
  Vessel being towed
- B.
  
  Vessel aground
- C.
  
  Vessel not under command
- D.
  
  Vessel at anchor
Correct Answer
C. Vessel not under command

Explanation
A vessel not under command is indicated by two all round red lights displayed in a vertical line. This means that the vessel is unable to maneuver as required by the international rules of navigation and is therefore a hazard to other vessels. This could be due to a mechanical failure or any other circumstance that renders the vessel unable to control its movements.

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24.

Which of the following vessels, when anchored at night would not be required to show anchor light?
- A.
  
  A vessel engaged in pilotage duty
- B.
  
  A power driven vessel
- C.
  
  A vessel dredging
- D.
  
  A vessel restricted in her ability to maneuver
Correct Answer
C. A vessel dredging

Explanation
A vessel dredging would not be required to show an anchor light when anchored at night. This is because a vessel engaged in dredging operations is considered to be a "special purpose vessel" and is exempted from displaying an anchor light. Instead, it is required to display the appropriate lights and signals for its specific operation, such as dredging lights or shapes. These lights and signals are intended to inform other vessels of the vessel's restricted maneuverability and the nature of its work, ensuring safe navigation in the vicinity of the dredging operation.

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25.

What is the time interval between signals shall the fog signal be sounded?
- A.
  
  Not less than 1 minute
- B.
  
  Not more than 1 minute
- C.
  
  Not less than 2 minutes
- D.
  
  Not more than 2 minutes
Correct Answer
D. Not more than 2 minutes

Explanation
The fog signal should be sounded at intervals of not more than 2 minutes. This means that the fog signal should be sounded every 2 minutes or less, ensuring that it is regularly and frequently heard to alert other vessels in foggy conditions. Sounding the fog signal at shorter intervals helps to improve visibility and reduce the risk of collisions by providing timely and consistent warnings to nearby vessels.

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26.

Which vessel must exhibit forward and after masthead lights when underway?
- A.
  
  A 20 meters sailing vessels
- B.
  
  A 50 meters power driven vessels
- C.
  
  A 10 meters vessel engaged in fishing
- D.
  
  All of the above
Correct Answer
B. A 50 meters power driven vessels

Explanation
A 50 meters power driven vessel must exhibit forward and after masthead lights when underway. This is because according to international regulations, vessels over a certain length are required to display specific lights to ensure their visibility and to indicate their size and type to other vessels. The forward and after masthead lights are part of the lighting configuration for power driven vessels over a certain length, and they help other vessels determine the size and direction of the vessel.

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27.

You are fishing with gear out on the high seas while at anchor. What light would you show?
- A.
  
  A white light forward and aft
- B.
  
  A white over a white light
- C.
  
  A red light over a white light
- D.
  
  Regular anchor light
Correct Answer
C. A red light over a white light

Explanation
When fishing with gear out on the high seas while at anchor, it is important to display a red light over a white light. This combination of lights indicates to other vessels that you are engaged in fishing activities and are stationary. The red light helps other boats to identify your position and avoid colliding with you, while the white light provides general visibility. By showing a red light over a white light, you are following the proper protocol for indicating your presence and ensuring safety on the water.

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28.

The three black balls in a vertical line where they can best be seen is to be shown by the vessel:
- A.
  
  Anchored
- B.
  
  Aground
- C.
  
  Constrained by her draft
- D.
  
  None of the above
Correct Answer
B. Aground

Explanation
The correct answer is "aground". When a vessel is aground, it means that it is resting on the bottom of the body of water, such as a river or sea floor. In this situation, the vessel is not moving and is stuck in a fixed position. This allows the three black balls to be visible in a vertical line, as the vessel is not affected by any movement or current. Anchored and constrained by her draft do not necessarily imply that the vessel is stationary or stuck, so they are not the best options.

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29.

A vessel proceeding under sail and when also being propelled by machinery shall exhibit where it can best be seen.
- A.
  
  The basket
- B.
  
  The conical shape apex downward
- C.
  
  The conical shape apex upward
- D.
  
  None of the above
Correct Answer
B. The conical shape apex downward

Explanation
A vessel proceeding under sail and also being propelled by machinery should exhibit a conical shape with the apex downward. This is to indicate to other vessels that it is both under sail and using machinery for propulsion. By displaying this shape, it helps other vessels determine the vessel's speed and maneuverability, allowing them to take appropriate action to avoid any potential collisions.

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30.

The two all round red lights in a vertical line, exhibited by the vessel engaged in dredging is to indicate:
- A.
  
  The side on which the obstruction exist
- B.
  
  The sides on which another vessel may pass
- C.
  
  The side on which the outlaying gear extend 150 meters horizontal
- D.
  
  None of the above
Correct Answer
A. The side on which the obstruction exist

Explanation
The two all round red lights in a vertical line, exhibited by the vessel engaged in dredging, indicate the side on which the obstruction exists. This is important information for other vessels to know in order to navigate safely around the dredging vessel and avoid the obstruction. The red lights serve as a clear visual signal to indicate the presence of the obstruction and the side on which it is located.

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31.

Vessel is towing two barges astern. The length of the tow from the stern of towing vessel to the stern of the large barge is 250 meters. How may masthead lights should be displayed on the towboatd at night.
- A.
  
  2
- B.
  
  3
- C.
  
  1
- D.
  
  4
Correct Answer
B. 3

Explanation
According to the International Regulations for Preventing Collisions at Sea (COLREGs), a vessel towing another vessel astern should display three masthead lights at night. One masthead light is displayed on the towed vessel, and two masthead lights are displayed on the towing vessel. Therefore, the correct answer is 3.

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32.

A towing vessel 35 meters in length, witha tow 100 meters astern must shown a minimum of how many masthead lights?
- A.
  
  2
- B.
  
  4
- C.
  
  3
- D.
  
  1
Correct Answer
A. 2

Explanation
A towing vessel that is 35 meters in length and has a tow 100 meters astern must show a minimum of two masthead lights. This is because according to maritime regulations, a towing vessel must display two masthead lights when it is towing another vessel or object. These lights indicate to other vessels in the vicinity that the vessel is engaged in towing operations and helps ensure safe navigation and avoidance of collisions.

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33.

What is the minimum sound signaling equipment required aboard a vessel 14 meters in length.
- A.
  
  A bell only
- B.
  
  Whistle only
- C.
  
  A bell and a whistle
- D.
  
  Gong
Correct Answer
B. Whistle only

Explanation
The minimum sound signaling equipment required aboard a vessel 14 meters in length is a whistle only. This is because vessels between 12 and 20 meters in length are only required to have a whistle as their sound signaling equipment according to international regulations. A bell is not required for vessels of this length. A gong is also not mentioned as a mandatory requirement for vessels of this size.

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34.

A vessel which does not normally engaged in towing preparations, is towing a vessel in distress, she:
- A.
  
  Must show the lights for a vessel towing
- B.
  
  Must show a yellow light above the stern light
- C.
  
  May show the lights for a vessel not under command
- D.
  
  Need not show the lights for a vessel engaged in towing,if it is impractical to do so
Correct Answer
D. Need not show the lights for a vessel engaged in towing,if it is impractical to do so

Explanation
When a vessel that does not normally engage in towing is towing a vessel in distress, it is not required to show the lights for a vessel engaged in towing if it is impractical to do so. This means that if it is not possible or safe for the vessel to display the towing lights, it is not obligated to do so. This exception allows for flexibility and prioritizes the safety of the vessels involved in the towing operation.

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35.

Which statement is true concerning a towing vessel which unable to deviate from her course?
- A.
  
  By day, she should carry two black balls in a vertical line
- B.
  
  By day, she should a black cylinder
- C.
  
  By night, she would show the same lights as the vessel N.U.C.
- D.
  
  By day, she would show the same shapes as the vessel R.A.M.
Correct Answer
D. By day, she would show the same shapes as the vessel R.A.M.

Explanation
A towing vessel that is unable to deviate from her course should show the same shapes as the vessel R.A.M. This means that during the day, the towing vessel should display the same shapes (such as balls, diamonds, squares, etc.) as the Restricted in Ability to Maneuver (R.A.M.) vessel. This is important for other vessels to be aware of the towing vessel's restricted maneuverability and take appropriate action to avoid any potential collisions or accidents.

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36.

A vessel which is fishing is required to show sidelights and sternlight only when:
- A.
  
  Underway
- B.
  
  Underway and making way
- C.
  
  Anchored
- D.
  
  Dead in the water
Correct Answer
B. Underway and making way

Explanation
When a vessel is "underway and making way," it means that it is in motion and actively propelling through the water. In this situation, it is necessary for the vessel to display sidelights and a sternlight. Sidelights are required to be visible from ahead to 22.5 degrees abaft the beam on both sides of the vessel, while the sternlight should be visible from astern to 67.5 degrees on both sides. These lights help other vessels determine the direction and position of the moving vessel, ensuring safe navigation and preventing collisions.

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37.

A 20 meters sailing vessel underway must exhibit a:
- A.
  
  Red over a green light at the masthead
- B.
  
  Sidelights and stern light
- C.
  
  Combine lantern
- D.
  
  All of the above
Correct Answer
B. Sidelights and stern light

Explanation
A 20 meters sailing vessel underway must exhibit sidelights and a stern light. This is because according to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel of this size and type should display a red sidelight on the port (left) side, a green sidelight on the starboard (right) side, and a white stern light at the back. These lights help other vessels determine the sailing vessel's position, direction, and maneuverability, ensuring safe navigation and avoiding collisions.

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38.

When will you hoist flag "G" in fishing vessel during operation?
- A.
  
  When shooting nets
- B.
  
  When nets come fast to an obstruction
- C.
  
  When hauling nets
- D.
  
  When pair trawling
Correct Answer
C. When hauling nets

Explanation
The flag "G" is hoisted in a fishing vessel during the operation of hauling nets. This is done to indicate to other vessels in the vicinity that the vessel is engaged in the process of pulling in its fishing nets. Hoisting the flag helps in alerting other vessels and ensuring safety during the operation.

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39.

It means any sound signaling appliances capable of producing the prescribed blasts:
- A.
  
  Whistle
- B.
  
  Gong
- C.
  
  Bell
- D.
  
  All of the above
Correct Answer
A. Whistle

Explanation
The correct answer is "whistle" because a whistle is a sound signaling appliance that is capable of producing the prescribed blasts. It is a small handheld device that can be blown into to create a loud and distinctive sound, often used for signaling purposes in various contexts such as sports events, emergency situations, or signaling on ships. A whistle is a common and widely recognized signaling device that can effectively alert and communicate with others.

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40.

In international waters you sight a vessel showing an all round light on the bow and on the stern, together with two red lights in a vertical line. This would indicate a vessel:
- A.
  
  Engaged in underwater operations
- B.
  
  Dredging
- C.
  
  Fishing with gear out over 500 feet
- D.
  
  Aground
Correct Answer
D. Aground

Explanation
The vessel showing an all round light on the bow and on the stern, together with two red lights in a vertical line, indicates that it is aground. This is because the all round light on the bow and stern are required when a vessel is not making way, and the two red lights in a vertical line are used to indicate a vessel that is not under command. Therefore, the combination of these lights suggests that the vessel is stuck or grounded and unable to move.

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41.

Which vessel must show a masthead light abaft of and higher than her identifying lights?
- A.
  
  10 meters vessel towing
- B.
  
  100 meters not under command
- C.
  
  55 meters vessel trawling
- D.
  
  30 meters vessel not under command
Correct Answer
C. 55 meters vessel trawling

Explanation
A vessel trawling is required to show a masthead light abaft of and higher than her identifying lights. Trawling is a fishing method that involves dragging a net behind the vessel, and it is important for other vessels to be able to identify the trawling vessel and its position. By displaying a masthead light abaft of and higher than the identifying lights, the trawling vessel ensures that it is easily visible to other vessels and helps to prevent collisions at sea.

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42.

A vessel not under command making way at night would show:
- A.
  
  Anchor lights and running lights
- B.
  
  Two all round red lights in a vertical line
- C.
  
  Two all round red lights in a vertical line, sidelights and stern light
- D.
  
  Two all round white lights in a vertical line, sidelights and stern light
Correct Answer
C. Two all round red lights in a vertical line, sidelights and stern light

Explanation
A vessel not under command making way at night would show two all round red lights in a vertical line, sidelights, and a stern light. This is because a vessel not under command is unable to maneuver as required by the International Regulations for Preventing Collisions at Sea (COLREGS). The all round red lights in a vertical line indicate that the vessel is not under command, while the sidelights and stern light are required for navigation and to indicate the vessel's direction and presence to other vessels. The combination of these lights helps ensure the safety and visibility of the vessel at night.

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43.

Which of this vessel is not required to exhibit an anchor light
- A.
  
  R.A.M.
- B.
  
  N.U.C.
- C.
  
  Dredger
- D.
  
  Pilot
Correct Answer
C. Dredger

Explanation
A dredger is not required to exhibit an anchor light because it is a vessel that is used for excavation and clearing of sediments from the bottom of water bodies, typically rivers or harbors. Dredgers are stationary or slow-moving vessels that do not pose a navigational hazard to other vessels, unlike R.A.M. (Restricted in Ability to Maneuver) and N.U.C. (Not Under Command) vessels. Therefore, they are exempt from the requirement of displaying an anchor light. A pilot vessel, on the other hand, is required to exhibit an anchor light when it is at anchor.

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44.

Within the context of the rules which of the following factors must be taken accound when considering a vessel to be constrained by her draught
- A.
  
  Depth of water beneath the keel
- B.
  
  Space available for maneuver
- C.
  
  Draft of the vessel
- D.
  
  Length and draft of the vessel
Correct Answer
C. Draft of the vessel

Explanation
When considering a vessel to be constrained by her draught, the factor that must be taken into account is the draft of the vessel. The draft refers to the depth of the vessel's hull below the waterline. If a vessel has a significant draft, it means that it requires a certain depth of water to safely navigate. Therefore, when determining if a vessel is constrained by her draught, the draft of the vessel is the most important factor to consider.

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4
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45.

You are on restricted visibility and hear a fog signal forward of your beam. Nothilesng appears on your radar screen. The rules requires you to:
- A.
  
  Stop your engines
- B.
  
  Sound the danger signal
- C.
  
  Sound two prolonged blasts on your whistle
- D.
  
  Slow down to bare steerage way
Correct Answer
D. Slow down to bare steerage way

Explanation
When you are on restricted visibility and hear a fog signal forward of your beam, it means that there is a potential danger nearby that you cannot see on your radar screen. In this situation, the rules require you to slow down to bare steerage way. This means reducing your speed to the minimum level that allows you to maintain control and maneuverability of the vessel. By doing so, you can navigate cautiously and be prepared to take immediate action if necessary to avoid any collision or accident.

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46.

You sight a vessel displaying two cones with their points apexes togethe is the vessel:
- A.
  
  Aground in international waters
- B.
  
  Engaged in fishing
- C.
  
  Towing submerged object
- D.
  
  In distress and requires assistance
Correct Answer
B. Engaged in fishing

Explanation
The vessel displaying two cones with their points apexes together is engaged in fishing. This is because the International Regulations for Preventing Collisions at Sea (COLREGs) specify that a vessel engaged in fishing must display two cones in a vertical line with their apexes together. This signal alerts other vessels to the fact that there are fishing operations taking place and they need to navigate with caution to avoid interfering with the fishing vessel's gear.

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47.

You are underway in fog and hear a fog signal on your starboard quarter. You should:
- A.
  
  Stop your engine
- B.
  
  Alter course to starboard
- C.
  
  Change course to the left
- D.
  
  Hold your course and speed
Correct Answer
D. Hold your course and speed

Explanation
Maritime navigation rules, often referred to as the "Rules of the Road" or COLREGs (International Regulations for Preventing Collisions at Sea), generally advise maintaining your course and speed to avoid sudden maneuvers that could confuse other vessels about your intentions. However, you should proceed with caution, be prepared to take evasive action if necessary, and continuously monitor the situation. Use additional sound signals and maintain a proper lookout by sight and hearing.

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48.

A vessel approaching a bend or narrow channel should sound:
- A.
  
  One prolonged blast
- B.
  
  One short blast
- C.
  
  One long and one short blast
Correct Answer
A. One prolonged blast

Explanation
When a vessel is approaching a bend or narrow channel, it should sound one prolonged blast. This is a signal to other vessels in the area that the vessel intends to navigate the bend or channel and is requesting right-of-way or warning them of its presence. The prolonged blast is a continuous sound that lasts for a duration of 4-6 seconds. By sounding this signal, the vessel is ensuring safe navigation and communication with other vessels in the vicinity.

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49.

By night, you sight the lights of a vessel engaged in underwater operations. If an obstruction exist on the port side of the vessel it will marked by:
- A.
  
  A single red light
- B.
  
  A flood light
- C.
  
  Two red lights in a vertical line
- D.
  
  Any visible light
Correct Answer
C. Two red lights in a vertical line

Explanation
When a vessel is engaged in underwater operations and there is an obstruction on its port side, it will be marked by two red lights in a vertical line. This is a common practice to indicate the presence of an obstruction or danger to other vessels in the vicinity. The vertical arrangement of the lights helps in distinguishing them from other types of lights and provides a clear indication of the obstruction's location.

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50.

Day shapes must be displayed
- A.
  
  During daylight hours in unrestricted visibility only
- B.
  
  Only between 8 am and 5 pm
- C.
  
  During daylight hours in any visibility
- D.
  
  Between sunset and sunrise
Correct Answer
C. During daylight hours in any visibility

Explanation
Day shapes must be displayed during daylight hours in any visibility. This means that regardless of the visibility conditions, such as fog or mist, the day shapes should still be displayed during daylight hours. These shapes are used to indicate the status or characteristics of a vessel to other nearby vessels, and it is important for them to be visible even in low visibility conditions. Therefore, the correct answer is "during daylight hours in any visibility."

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Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Jun 28, 2024

Quiz Edited by
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Dec 24, 2011

Quiz Created by
Torah_tesay

Do You Know About The Seas And Vessels? Take This Quiz!

The sound signal for a vessel operating in astern propulsion is

What dayshape would be exhibited by a vessel aground

Which vessel may carry her sidelights and sternlight in one combined lantern

The three all round green lights exhibited at or near the foremast head and attach end of the foreyard, indicate that it is dangerous for another vessel to approach within how many meters from this vessel.

A vessel engaged in fishing must display a light in the direction of any gear extends outward more than 150 meters. The color of this light is:

Vessel constrained by her draught must exhibit where they can best be seen

When psuhing vessel and a vessel being pushed ahead are rigidly connected in composite unit they shall exhibit the lights for.

A vessel engaged in trawling will show identification lights:

As defined in the navigation rules, a masthead light shows through an arc of how many degrees?

The masthead light may be located at other than fore and aft centerline of a vessel:

In what instance is the yellow light of the towing vessel is placed above the stern light?

A vessel being towed astern, where the length of the two exceeds 200 meters will exhibit:

You are approaching a vessel dredging by day and see two balls in vertical line on the port side of the dredge. These shapes mean:

A pilot vessel on pilotage duty at night will show sidelights and a sternlight

Length of vessel, when aground are not required to exhibit the lights prescribed in rule 30 d i and ii

The masthead light of a vessel less than 12 meters in length should be visible at:

In day time a 19 meters vessel underway and fishing with nets or lines, may indicate her occupation by displaying

In what condition of visibility may be danger signal be sounded.

You are backing out of a slip in international water and can be seen by an approaching vessel. Which of the following would you give?

Which statement is true concerning a vessel under oars?

At sea you sight a vessel displaying a black conical shape, point downward. This would indicate:

Which vessel would exhibit sidelights when underway and not making way?

Two all round red lights displayed in a vertical line are shown by a:

Which of the following vessels, when anchored at night would not be required to show anchor light?

What is the time interval between signals shall the fog signal be sounded?

Which vessel must exhibit forward and after masthead lights when underway?

You are fishing with gear out on the high seas while at anchor. What light would you show?

The three black balls in a vertical line where they can best be seen is to be shown by the vessel:

A vessel proceeding under sail and when also being propelled by machinery shall exhibit where it can best be seen.

The two all round red lights in a vertical line, exhibited by the vessel engaged in dredging is to indicate:

Vessel is towing two barges astern. The length of the tow from the stern of towing vessel to the stern of the large barge is 250 meters. How may masthead lights should be displayed on the towboatd at night.

A towing vessel 35 meters in length, witha tow 100 meters astern must shown a minimum of how many masthead lights?

What is the minimum sound signaling equipment required aboard a vessel 14 meters in length.

A vessel which does not normally engaged in towing preparations, is towing a vessel in distress, she:

Which statement is true concerning a towing vessel which unable to deviate from her course?

A vessel which is fishing is required to show sidelights and sternlight only when:

A 20 meters sailing vessel underway must exhibit a:

When will you hoist flag "G" in fishing vessel during operation?

It means any sound signaling appliances capable of producing the prescribed blasts:

In international waters you sight a vessel showing an all round light on the bow and on the stern, together with two red lights in a vertical line. This would indicate a vessel:

Which vessel must show a masthead light abaft of and higher than her identifying lights?

A vessel not under command making way at night would show:

Which of this vessel is not required to exhibit an anchor light

Within the context of the rules which of the following factors must be taken accound when considering a vessel to be constrained by her draught

You are on restricted visibility and hear a fog signal forward of your beam. Nothilesng appears on your radar screen. The rules requires you to:

You sight a vessel displaying two cones with their points apexes togethe is the vessel:

You are underway in fog and hear a fog signal on your starboard quarter. You should:

A vessel approaching a bend or narrow channel should sound:

By night, you sight the lights of a vessel engaged in underwater operations. If an obstruction exist on the port side of the vessel it will marked by:

Day shapes must be displayed