Collision Regulations (COLREGS)

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Questions and Answers

What is the primary action a vessel should take to avoid a collision?

Use radar to assess risk and change course only when absolutely necessary to pass close by.
Make a large alteration of course that is easily apparent to another vessel. (correct)
Make small course alterations without communicating the intention.
Maintain constant course and speed until the other vessel alters course.

In a traffic separation scheme, what is the primary responsibility of a vessel crossing a traffic lane?

To follow the general direction of traffic flow within the lane to the greatest extent possible.
To cross at a sharp angle relative to the general direction of traffic flow.
To use the inshore traffic zone as a primary route to avoid crossing traffic lanes.
To cross the lane as quickly as possible and oriented at right angles to the traffic flow. (correct)

What action should a stand-on vessel take if it becomes apparent that the give-way vessel is not taking appropriate action to avoid a collision?

The stand-on vessel may take action to avoid collision by maneuvering. (correct)
The stand-on vessel should maintain its course and speed, as it has the right-of-way.
The stand-on vessel should immediately stop its engines to signal its intention.
The stand-on vessel should communicate via radio even if a VHF channel for bridge-to-bridge communication is not designated.

Under what conditions might a give-way vessel maintain its course and speed?

A give-way vessel should never maintain course and speed; it must always take early and substantial action to keep well clear. (C) Signup and view all the answers

A power-driven vessel is approaching a sailing vessel. Which vessel is the stand-on vessel?

The sailing vessel, except when it is overtaking the power-driven vessel. (B) Signup and view all the answers

Which lights must a power-driven vessel underway exhibit?

A masthead light, sidelights, and a stern light. (D) Signup and view all the answers

A vessel restricted in its ability to maneuver (RAM) is engaged in transferring goods. What lights must it show?

Three all-round lights in a vertical line, the highest and lowest being red and the middle being white; sidelights; and sternlight. (C) Signup and view all the answers

Under what circumstances should a vessel use a sound signal of one prolonged blast followed by one short blast?

When maneuvering in sight of another vessel. (B) Signup and view all the answers

What is the purpose of auxiliary equipment such as screens or shades for sidelights?

To ensure that the sidelights are not visible across the bow. (A) Signup and view all the answers

What does a rapid series of short blasts from a vessel's whistle indicate?

The vessel is sounding a danger signal because it is unsure of the other vessel's actions. (D) Signup and view all the answers

When are vessels permitted to use signals to attract attention that cannot be mistaken for any signal authorized elsewhere in the rules?

If necessary to attract the attention of another vessel. (D) Signup and view all the answers

According to Annex I, what is the function of light sector descriptions?

To define the precise angles within which lights must be visible. (C) Signup and view all the answers

In accordance with Annex II, what is the significance of signals used by fishing vessels?

To indicate they are fishing with gear that extends more than 150 meters horizontally. (A) Signup and view all the answers

What sound-producing equipment does a vessel of 15 meters in length need to carry?

A whistle and a bell. (C) Signup and view all the answers

A vessel is at anchor during daylight hours. What signal is required to be displayed?

A black ball. (A) Signup and view all the answers

Why is it important to verify compliance with COLREGs?

To ensure that all vessels adhere to international standards, promoting safety of life at sea and preventing collisions. (C) Signup and view all the answers

What should be the approximate horizontal spacing of the masthead lights of a power-driven vessel of 60 meters in length?

One quarter of the length of the vessel. (C) Signup and view all the answers

What is the minimum range of visibility for a sidelight on a vessel of 20 meters or more in length?

2 nautical miles (D) Signup and view all the answers

When towing, what lights should a power-driven vessel exhibit in addition to the lights prescribed for power-driven vessels?

Three masthead lights in a vertical line, sidelights, a stern light and a yellow towing light above the stern light. (B) Signup and view all the answers

According to Annex IV, what principles should be followed when assessing the risk of collision?

Use all available means to determine if risk of collision exists, including radar, visual sightings, and other available information. (A) Signup and view all the answers

Flashcards

Avoiding collision risk

Take positive action in ample time to avoid a collision, especially by altering course or speed.

Traffic Separation Schemes (TSS)

Schemes that organize maritime traffic flow, reducing the risk of collisions in busy or narrow waterways.