Dwatch quiz
Navigational Safety Quiz
Test your knowledge on maritime navigation and safety regulations with our comprehensive quiz! Understand key concepts, rules, and terminology that are crucial for safe sailing and maneuvering.
- 63 challenging questions
- Multiple choice format
- Ideal for marine students, professionals, and enthusiasts
It means a vessel which through some exceptional circumstance is unable to maneuver as required by Colregs.
NUC
RAM
BBC
SOS
It means any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms or any other similar causes.
Unrestricted Visibility
Restricted Visibility
Vessel constrained by her draught
Restriction Visibility
The term sailing vessel means any vessel under sail provided that propelling machinery, if fitted, is being used.
True
False
It means that a vessel is not at anchor, or made fast to the shore, or aground.
Seaplane
Vessel not under command
Underway
Sailing vessel
The term vessel engaged in fishing means any vessel fishing with trolling lines.
True
False
It includes any aircraft designed to maneuver on the water.
Sea Airplane
Seaplane
Airplane at Sea
Plane Sea
Traffic separation schemes may NOT be adopted by the Organization for the purpose of these Rules.
True
False
The term vessels restricted in their ability to maneuver shall include vessel engaged in underwater operations.
True
False
The term vessel not under command means a vessel's steering gear system is non-operational.
True
False
Vessel shall be deemed to be in sight of one another only when one can be observed from the other by what?
Visually
RADAR
Restricted Visibility
ARPA
What should proceed in the appropriate traffic lane in the general direction of traffic flow for that lane?
15m power driven vessel
Power-driven vessel only
: at a safe distance
Any vessel
Which vessel should not impede the safe passage of a vessel that can only navigate in a narrow channel?
At a safe distance
Power-driven vessel only
Outer limit, starboard side
15m power driven vessel
Action taken to avoid collision with another vessel shall be such as to result in passing what?
Outer limit, starboard side
Anchoring
At a safe distance
90-degree angle
When proceeding along a narrow channel, you are going to be near which side as much as possible?
Inner limit, starboard side
Outer limit, starboard side
Outer limit, port side
Inner limit, port side
Scanty RADAR information. The word scanty also means
Incomplete
Complete
Best
More Complete
Which vessel should not impede the safe passage of a vessel that can only navigate in a narrow channel?
Cargo Vessel
Container Vessel
Fishing vessel
Ro-Ro Vessel
If alteration of course alone is possible to avoid collision, such alteration shall be what?
Small enough
Stand on
Give way
Large enough
What risk is deemed to exist if the target’s bearing does not appreciably change?
Collision
Constraints
Manouevrability
Stopping
Is Rule 14 head-on situation applicable to all vessels?
True
False
Which vessel shall keep out of the way of the other?
Drifting
overtaking
Stopping
Anchoring
A vessel shall be deemed to be overtaking when coming up with another vessel from a direction more than 21.5 degrees abaft her beam.
True
False
When a vessel is in any doubt as to whether she is overtaking another, she shall assume that she is overtaking and a stand-on vessel.
True
False
When both sailing vessels have the wind on the same side, which sailing vessel shall keep out of the way?
Narrow winds
Fair winds
Windward side
Leeward side
If a sailing vessel with the wind on the port side sees a vessel to windward and cannot determine with certainty whether the other vessel has the wind on the port or on the starboard side, what would be her action?
Give way
Overtake
Stand on
Emergency stop
When you are in any doubt as to whether head-on situation exists, you shall assume that it does exist and act accordingly.
True
False
An overtaking vessel shall only see what navigational light of the vessel being overtaken
Navigational light
Stern light
Forward light
Buoyancy light
Head on situation exists if you see approaching vessel with two masthead lights in the same vertical line.
True
False
For Rule12, this is the side opposite to that on which the largest fore-and-aft sail is carried.
Leeward
Windward side
Windward
Leeward side
In an area of restricted visibility, as an OOW, it is ok NOT to use sound signals.
True
False
Every vessel which hears apparently forward of her beam the fog signal of another vessel, shall reduce her speed to the minimum at which she can be kept on course at all times.
True
False
Rule 19 applies to vessels not in sight of one another when navigating in or near an area of what visibility?
Restricted Visibility
Unrestricted Visibility
Safe Visibility
Clear Visibility
Sailing vessels must comply with Rule 19 when navigating in restricted visibility.
True
False
A sailing vessel shall have her engines ready for immediate maneuver.
True
False
Rule 19 applies ONLY to power driven vessels not in sight of one another when navigating in or near an area of restricted visibility.
True
False
Safe speed must be adapted to the prevailing circumstances and conditions of restricted visibility even at high seas.
True
False
To avoid close quarter situation, you must alter course toward a vessel abeam or forward of the beam in restricted visibility.
True
False
What is the status of all vessels navigating in restricted visibility?
Heavy-lift vessel
Ro-ro vessel
Cargo vessel
Give-way vessel
An alteration of course to port for a vessel forward of the beam, other than for a vessel being overtaken should be avoided in areas of restricted visibility.
True
False
Assumptions shall ALWAYS be made on the basis of scanty information, especially scanty radar information
True
False
A vessel, the passage of which is not to be impeded remains fully obliged to _____ with the rules of this part when the two vessels are approaching one another so as to involve risk of collision.
Take all way off
Be completed
Be safe with
Comply
It means stopping engine or reversing her means of propulsion so as to stop the movement of the ship.
Take all way off
Take one call away off
Take all way down
Take all way closed
If there is sufficient sea room, alteration of course alone may be the most effective action to avoid a close-quarters situation provided that it is made in good time, is substantial and does not result in another _____ situation.
Close-quarter
Traffic separation scheme
Collision avoidance
Narrow channel
If there is any doubt that risk of collision exist, such risk shall be deemed NOT to exist.
True
False
Scanty RADAR information. The word scanty also means.
Complete
Incomplete
Full
Best
Any action taken to avoid collision shall be taken in accordance with the Rules of this Part and shall, be positive, made in ample time and with due regard to the observance of good seamanship.
True
False
If alteration of course alone is possible to avoid collision, such alteration shall be what?
Small enough
Large enough
What risk is deemed to exist if the target’s bearing does not appreciably change?
Sinking
Listing
Collision
Restricted visibility
Action taken to avoid collision with another vessel shall be such as to result in passing what?
Drifting
At a safe distance
Anchoring
Stopping
A vessel nearing a bend or an area of a narrow channel or fairway where other vessels may be obscured by an intervening obstruction shall shall sound one short blast.
True
False
Which vessel should not impede the safe passage of a vessel that can only navigate in a narrow channel?
Cargo vessel
Ro-Ro vessel
Container Vessel
Fishing Vessel
Which vessel should not impede the safe passage of a vessel that can only navigate in a narrow channel?
15m power driven vessel
20m power driven vessel
25m power driven vessel
30m power driven vessel
A vessel proceeding along the course of a narrow channel or fairway shall keep as near to the _____ of the channel or fairway which lies on her starboard side as is safe and practicable.
Inner limit
Outer limit
A vessel engaged in _____ shall not impede the passage of any other vessel navigating within a narrow channel or fairway.
Fishing
Anchoring
Power-driven vessel
Sailing vessel
Any vessel shall avoid anchoring in a narrow channel.
True
False
Which vessel should not impede the safe passage of a vessel that can only navigate in a narrow channel?
Sailing vessel
Fishing vessel
Power driven vessel
Anchoring vessel
Which action is as much as possible avoided in a narrow channel?
Anchoring
Collision
Fishing
Stopping
A vessel of less than _____ meters in length or a sailing vessel shall not impede the passage of a vessel which can safely navigate only within a narrow channel or fairway.
20
21
22
23
When proceeding along a narrow channel, you are going to be near which side as much as possible?
Outer limit, port side
Outer limit, starboard side
Inner limit, starboard side
Inner limit, port side
Which action is as much as possible avoided in a TSS?
Collision
Sailing
Anchoring
Stopping
Which vessel should not impede the passage of any vessel following a traffic lane?
Power Driven Vessel
Sailing Vessel
Fishing Vessel
Cargo Vessel
What should proceed in the appropriate traffic lane in the general direction of traffic flow for that lane?
Any vessel
Not limited to 15m vessels
Fishing Vessel
Not limited to 20m vessels
Which vessel should not impede the safe passage of a power-driven vessel following a traffic lane?
15m power driven vessel
20m power driven vessel
25m power driven vessel
10m power driven vessel
A vessel shall, so far as practicable, avoid crossing traffic lanes but if obliged to do so shall cross on a heading as nearly as practicable at what angle to the general direction of traffic flow?
45-degree angle
90-degree angle
180-degree angle
120-degree angle
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