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Questions and Answers

Under what condition can a vessel use any sound or light signals to attract the attention of another vessel?

The signal cannot be mistaken for a distress signal

Red and green lights are not used

The vessel signals its intentions over the radiotelephone

It is one of those listed under Annex IV of the Collision Regulations (correct)

Which light is shown by a 200-meter vessel at anchor?

A 135-degree white light in the after part of the vessel

An all-round red or green light

Any available working lights to illuminate the decks

A 225-degree white light in the forepart of the vessel (correct)

What is a signal that can be used by a vessel to attract attention, excluding distress signals?

A searchlight beam (correct)

Burning barrels

Calling 'Mayday' on the radiotelephone

A continuous sounding of a fog signal apparatus

Which vessel would NOT sound a fog signal of one prolonged and two short blasts?

A vessel at anchor Signup and view all the answers

Which signal can be sounded only by vessels in restricted visibility?

At least five short and rapid blasts Signup and view all the answers

What type of vessel is excluded from sounding a fog signal of one prolonged and two short blasts?

A vessel at anchor Signup and view all the answers

What should you do when another vessel in a crossing situation sounds one short blast and you intend to hold course and speed?

Answer with one short blast Signup and view all the answers

What should Vessel 'Q' sound in response to Vessel 'P' sounding two short blasts?

Two short blasts Signup and view all the answers

What is true about the situation where Vessel 'A' sights Vessel 'B' which is a vessel underway and fishing?

Vessel 'A' must keep out of the way of vessel 'B' Signup and view all the answers

When is it prohibited to display lights which may be confused with required navigation lights?

From sunset to sunrise and during restricted visibility Signup and view all the answers

Under what circumstance can an officer of the watch deviate from the Rules of the Road?

To avoid immediate danger Signup and view all the answers

What is the purpose of whistle signals in a crossing situation?

To signal intentions Signup and view all the answers

What is considered an efficient sound signal for a vessel?

Any means of making a sound signal Signup and view all the answers

What day signal should a vessel constrained by its draught display?

A black cylinder having a diameter of not less than a specified size Signup and view all the answers

What lights should a towing vessel pushing a barge ahead and rigidly connected in a composite unit display?

The lights of a power-driven vessel towing Signup and view all the answers

When making a course alteration to avoid collision, what should be done?

Make a succession of small changes in course Signup and view all the answers

What type of vessel is a commercial airliner in the water?

A seaplane Signup and view all the answers

Which vessel is considered 'restricted in her ability to maneuver'?

A vessel engaged in mineclearing Signup and view all the answers

What happens when you approach another vessel's stern in a narrow channel?

The vessels will drift apart Signup and view all the answers

What can happen to a vessel transiting a narrow channel?

The bow will be sucked towards the bank Signup and view all the answers

According to the Collision Regulations, what is the correct definition of 'underway'?

Only if she is NOT at anchor or made fast Signup and view all the answers

What is the course of a vessel heading SSE?

157.5deg Signup and view all the answers

What is the minimum sound signaling equipment required aboard a vessel 10-meters in length?

A bell and a whistle Signup and view all the answers

When does a vessel not need to take action to avoid collision?

When the bearing of the vessel does not appreciably change Signup and view all the answers

What type of vessel is a vessel that has her anchor down but not holding?

A vessel restricted in her ability to maneuver Signup and view all the answers

What is the requirement for a vessel of less than 12 meters in length regarding bell and gong signals?

A vessel of less than 12 meters in length need not have bell and gong signals Signup and view all the answers

What type of vessel is classified as a vessel restricted in her ability to maneuver, except?

A vessel engaged in normal navigation Signup and view all the answers

What is the purpose of the competence and vigilance of the officer of the watch?

To avoid dangerous situations Signup and view all the answers

What type of vessels does the 'collision avoidance rules' apply to?

All vessels, regardless of size or operation Signup and view all the answers

What is the fog signal sounded by a 95-meter vessel aground?

A rapid ringing of a bell for 5 seconds, every 2 minutes Signup and view all the answers

Study Notes

Sound Signals

A vessel may use any sound or light signals to attract the attention of another vessel, as long as it is not mistaken for a signal authorized by the rules.
A vessel can use a searchlight beam, burning barrel, or continuous sounding of a fog signal apparatus to attract attention.
A vessel in restricted visibility can sound a fog signal of one prolonged and two short blasts.
In a crossing situation, if the other vessel sounds one short blast, the responding vessel should sound one short blast to indicate holding course and speed.

A 200-meter vessel at anchor shows a 225-degree white light in the forepart and a 135-degree white light in the after part.
A vessel constrained by its draft shows a black cylinder with a diameter of not less than 1 meter.
A towing vessel pushing a barge ahead and rigidly connected in a composite unit shows the lights of a power-driven vessel towing.

Vessel Encounter

A vessel underway on the high seas in restricted visibility that hears a fog signal of one prolonged and two short blasts, it could be a vessel being towed, not under command, or constrained by its draft.
When two power-driven vessels are crossing within one half mile of each other, the stand-on vessel sounds two short blasts, and the give-way vessel should sound one short blast.
Vessel "A" underway, sighting vessel "B" which is a vessel underway and fishing, must keep out of the way of vessel "B".

The prohibition against displaying lights that may be confused with required navigation lights applies from sunset to sunrise and during restricted visibility.
An officer of the watch can deviate from the Rules of the Road to avoid immediate danger.
A course alteration made to avoid collision should be a large change, supplemented by a speed change.
A commercial airliner in the water is considered a seaplane.

Vessel Classification

A vessel engaged in mineclearing, fishing with trawls, or with a draft of such depth that it cannot navigate safely is considered a vessel "restricted in her ability to maneuver".
A vessel that has lost its rudder or is not under command is considered a vessel "not under command".

When overtaking a vessel moving in a parallel course in a narrow channel, the vessels will drift apart.
In a narrow channel, the bow can be pushed away from the bank or sucked towards the bank.

Sound Signaling Equipment

A vessel 10-meters in length must have a minimum sound signaling equipment of a bell and a whistle.
A vessel of less than 12 meters in length need not have a bell, but any vessel over 12-meters in length must be provided with a bell and a whistle.

Other Rules

The competence and vigilance of the officer of the watch provide the most direct means of avoiding dangerous situations.
The "collision avoidance rules" shall apply to all vessels.

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Description

Test your knowledge of maritime navigation signals and regulations. This quiz assesses your understanding of the rules and signals used to attract attention, avoid collisions, and navigate safely.

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