Mariners Learning Practice Test

These questions are part of the practice quiz. Start practicing

• What is the daytime signal for a vessel servicing a pipeline?
• Lookout requirements apply in which conditions?
• In a narrow channel, on which side should a vessel keep to stay near the limit of the channel?
• The phrase 'not under command' indicates the vessel is unable to maneuver due to
• Which combination of lights and dayshape indicates a vessel constrained by its draft?
• Which statement is TRUE concerning a vessel under oars?
• In fog, a vessel is required to signal at two-minute intervals. What is the signal?
• The sternlight shall be positioned such that it will show from dead astern to how many degrees on each side of the stern of the vessel?
• For a barge that is being pushed ahead and is not part of a composite unit, which lights are required?
• Which option correctly identifies the type of a vessel constrained by her draft?
• Which term is NOT defined in the Inland Navigation Rules?
• In international navigation rules, which vessel has the right of way with respect to a vessel constrained by its draft?
• In restricted visibility, a vessel restricted in her ability to maneuver, at anchor, would sound a fog signal of...
• What signal indicates doubt that sufficient action is being taken by another vessel to avoid collision?
• Which of the following is NOT a factor to consider when determining a safe speed?
• Regarding a "special flashing light", which statement is correct?
• For a vessel restricted in ability to deviate from her course at night, what lights are shown?
• A vessel transferring cargo while underway is classified by the Rules as a vessel
• If a fog signal is heard from another vessel forward of your beam and risk of collision exists, what must the other vessel do?
• What lights must be shown on a barge being towed astern at night?
• A vessel "restricted in her ability to maneuver" is one which
• On inland waters, which rules apply?
• A 'short blast' on the whistle has a duration of...
• In restricted visibility, a vessel detecting another by radar alone must determine if a close-quarters situation is developing. If it is, what must she do?
• In a narrow channel, an overtaking vessel, which intends to PASS on the other vessel's port side would sound...
• Which action should the vessel hearing a fog signal forward of its beam take if it determines that risk of collision exists?
• Your vessel is meeting another vessel head-on. To comply with the rules, you should exchange...
• Which statement is true concerning a vessel engaged in fishing?
• In a downstream scenario on the Great Lakes, which vessel has the priority when navigating in a narrow channel with a current?
• What is the status of a vessel that is not at anchor, not made fast to shore, and not at rest?
• Which sound signal should be used when approaching a bend in a channel with unseen opposing traffic?
• What does 'safe speed' mean for a vessel at sea?
• A vessel that is power-driven is defined as
• Under towing operations, which shape indicates an inconspicuous vessel or object being towed?
• A power-driven vessel 'not under command' at night must show her sidelights when?
• At night, what light does a vessel at anchor show?
• In restricted visibility, what fog signal should a vessel that is anchored use?
• In fog, how should a vessel at anchor signal to indicate its presence and location?
• A vessel using a traffic separation scheme shall NOT which of the following?
• In fog, one prolonged blast followed by two short blasts indicates that the vessel is ...
• What dayshape must be shown on a partly submerged vessel which is being towed?
• A vessel showing a green light over a white light in a vertical line above the level of the sidelights is ...
• When two power-driven vessels are meeting head-on and there is a risk of collision, each shall...
• Under restricted visibility, the steering and sailing rules apply to vessels navigating in or near restricted areas only if those vessels are showing what?
• The term 'restricted visibility' as used in the Rules refers to?
• What color is the towing light?
• In a narrow channel, what is the signal indicating an intent to pass on the other vessel's port side?
• For the Inland Navigation Rules, Inland Waters includes which of the following features?
• Each prolonged blast on whistle signals used by a power-driven vessel in fog, whether making way or underway but not making way, is ...
• A vessel underway and fishing shall keep out of the way of which vessel?
• A power-driven vessel exhibits the same lights as a...
• In fog, two prolonged blasts every two minutes indicate that the signaling vessel is ...
• If a vessel displays three all-round red lights in a vertical line at night, during the day she may show...
• If a tow is longer than 200 meters, which light arrangement is used on the towing vessel to indicate the tow length?
• What type of vessel or operation is indicated by a vessel showing two cones with apexes together?
• Which scenario is cited as a 'special circumstance' under the Rules?
• Which daylight signal indicates a vessel is aground?
• For an inconspicuous, partly submerged vessel or object being towed with a tow length of 100 meters, which shape must be shown?
• Which term describes a vessel that cannot maneuver due to exceptional circumstances?
• What is the primary obligation of the stand-on vessel in a crossing?
• If a sailing vessel with the wind on the port side sees a sailing vessel to windward and cannot tell whether the other vessel has the wind on port or starboard side, she shall...
• For safe speed, which factor is among those listed?
• A single towing light will be carried above a vessel's sternlight... Only if she is towing astern.
• You are approaching another vessel at night. You can see both red and green sidelights and, above the level of the sidelights, three white lights in a vertical line. The vessel may be...
• Dayshapes must be displayed during daylight hours in any visibility.
• Which factor is explicitly listed as a consideration when determining safe speed?
• Where must a lookout be maintained during navigation?
• The term "power-driven vessel" refers to any vessel
• Which statement applies to a vessel constrained by her draft according to international practice?
• The duration of a prolonged blast of the whistle is ...
• Which statement best describes the action to avoid collision?
• Which statement correctly identifies a vessel constrained by her draft?
• In a crossing situation, what is the correct action sequence if risk exists and the other vessel's action is unclear?
• You are underway and approaching a bend in the channel where vessels approaching from the opposite direction cannot be seen. You should sound...
• If your tug is pushing a barge ahead at night and it is not a composite unit, which light(s) should show aft on your vessel?
• On the Great Lakes with a current, which vessel shall sound the first passing signal when two power-driven vessels meet?
• A towing vessel 30 meters in length pushing barges ahead must show how many white masthead lights at night?
• Which of the following is true about a vessel constrained by her draft?
• You are overtaking another power-driven vessel in a narrow channel. The other vessel will have to move to allow you to pass. You wish to overtake the other vessel and leave her on your starboard side. Your FIRST whistle signal should be...
• What does an anchor ball indicate when displayed by a vessel?
• A vessel underway and fishing shall keep out of the way of a...
• At night you are towing a partly submerged vessel 20 meters in length and 4 meters in breadth. what lights must you display on the towed vessel?
• What lights must a barge being towed at night show?
• In Inland Waters, which statement is true regarding the inclusion of the Great Lakes and Western Rivers?
• In the overtaking scenario described, which vessel must move to facilitate passage?
• When two power-driven vessels cross, the vessel which has the other to starboard must keep out of the way if...
• Which statement is true regarding equipment for sound signals?
• Which term describes a vessel engaged in fishing?
• A vessel transferring cargo while underway is classified as 'restricted in her ability to maneuver' implies what?
• There is a provision to depart from the Rules, if necessary, to avoid
• In discussions of international navigation rules, a vessel constrained by her draft is defined as...
• Fog signal requirements apply under which governing rules for vessels of 20 meters in length?
• If you are underway in fog and hear a signal of one prolonged blast followed by two short blasts, this signal could indicate a vessel...
• If a gun is fired at one-minute intervals from a vessel, what does this indicate?
• Under fog signaling rules, the duration of a prolonged blast is always 4 to 6 seconds.
• Which vessel is the stand-on vessel when two vessels crossing in fog are NOT in sight of one another?
• When may the stand-on vessel take action to avoid collision by its own maneuver?
• If you are approaching another vessel and are not sure whether danger of collision exists, you must assume what?
• For the purpose of the Rules, does the term Vessel include seaplanes?
• During tow operations, which vessel is required to display two masthead lights in a vertical line?
• What daylight signal would indicate a vessel aground?
• Which statement is TRUE concerning two sailing vessels approaching each other?
• Which vessel must have a gong, or other equipment which will make the sound of a gong?
• Head-on exchange; which option represents the correct action sequence?
• Which statement is TRUE concerning narrow channels?
• In a head-on situation at night, which action is recommended for each vessel?
• Three white lights in a vertical line above the sidelights indicate which condition?
• If your vessel is dead in the water in fog after stopping your engines, which fog signal should you sound?
• In inland navigation, when another vessel crosses your course from starboard to port and you believe she will not pass safely, what signal should you sound?
• Which color is the towing light according to the Rules?
• Which signal indicates the vessel is at anchor?
• A towing light, according to the Rules, is a ...
• When a power-driven vessel is towing astern, which light arrangement is required?
• Which vessel is allowed to combine sidelights and sternlight in one lantern on the fore and aft centerline?
• Which waters are described by the term 'high seas' in the Rules?
• A white masthead light shows through an arc of how many degrees?
• A vessel transferring provisions or cargo at sea shall display during the day...
• Which vessel must exhibit forward and after masthead lights when underway?
• Which statement is true concerning a vessel 'constrained by her draft'?
• In the Rules of the Road, a vessel is considered engaged in fishing if she is
• You are underway in heavy fog and hear a fog signal ahead. What must you do?
• What is a requirement for any action taken to avoid collision?
• One and two short blast signals must be sounded on inland waters when...
• The use of the danger signal...
• If you detect a radar contact and you are not sure about collision risk, what is the recommended action?
• For a vessel restricted in her ability to deviate from her course, what is the vertical order of lights from top to bottom at night?
• A vessel towing is showing three forward white masthead lights in a vertical line. This means that the length of the tow is greater than 200 meters.
• Under international rules, a small power-driven vessel under 7 meters may show as a minimum one of which light at night?
• During daylight, how is a vessel not under command indicated?
• Risk of collision exists when an approaching vessel has which characteristic?
• In fog, if you hear a fog signal ahead and there is danger of collision, what should you do?
• Which action should you take in fog when radar indicates a close-quarters situation and you can act in time?
• In crossing on open water, a fishing vessel has another vessel sailing on its starboard side. Which vessel is the stand-on vessel?
• If two sailing vessels are running free with the wind on the same side, which one must keep clear of the other?
• What MAY be used to indicate the presence of a partly submerged object being towed?
• Which power-driven vessel is NOT required to carry a light in the position of the after masthead light?
• You are aboard the give-way vessel in a crossing situation. What should you NOT do in obeying the Rules?
• A 22-meter sailing vessel when also being propelled by machinery shall show during daylight hours a...
• A vessel sounds one short blast. This signal indicates the vessel ...
• While underway in fog, you hear a vessel ahead sound two prolonged blasts on the whistle. You should...
• Which dayshape is used by a fishing vessel with gear extending more than 150 meters?
• In an overtaking situation, which statement is TRUE?
• You are approaching a narrow channel. Another vessel in the channel can only be navigated safely in that channel. You should?
• A lantern combining a vessel's side lights may be shown on which vessel?
• Tow signaling method during towing operations?
• Crossing a narrow channel in an 18-meter tug, you sight a loaded tankship off your port bow. Which statement is correct?
• Barges being towed at night must exhibit navigation lights under what condition?
• Which vessel would display a cone with its apex pointing downward?
• In inland navigation, when a power-driven vessel in a narrow channel with a following current meets an upbound vessel, which vessel has the right-of-way?
• A sailing vessel overtaking a power-driven vessel in a narrow channel, so as to pass on the power-driven vessel's port side. The overtaken vessel will have to move to facilitate passage. The sailing vessel is the...
• In a crossing situation, which vessel may sound the danger signal?
• Which vessel is to be regarded as restricted in her ability to maneuver?
• Which vessel MUST show two masthead lights in a vertical line?
• A stand-on vessel is...
• Which vessel is an example of being restricted in her ability to maneuver?
• In a narrow channel, which vessel must not impede the passage of a vessel that can only navigate inside the channel?
• If you hear the firing of a gun at one-minute intervals from another vessel, this indicates that...
• On the Western Rivers, a power-driven vessel in a narrow channel meeting an upbound vessel: which statement is true?
• A vessel is overtaking when she can see which light(s) of a vessel ahead?
• In fog, a vessel of 25 meters at anchor must...
• A towing vessel 35 meters in length, with a tow 100 meters astern, must show a minimum of how many masthead lights?
• Which statement is true regarding the danger signal in crossing situations?
• During daylight, which dayshape identifies a vessel at anchor?
• In an approved special anchorage area, how many white anchor lights must a barge over 50 meters long display when anchored?
• What equipment for fog signals is required for a vessel 20 meters in length?
• When two power-driven vessels are meeting on the Great Lakes, Western Rivers, or waters specified by the Secretary, where there is a current, which vessel shall sound the first passing signal?
• Which statement best matches the term 'constrained by her draft' in international maritime regulations?
• Which vessel is underway?
• Under the COLREGs, a 'vessel constrained by her draft' is characterized by being...
• In a crossing where wind conditions cause ambiguity about wind direction, what should a sailing vessel do when unable to determine whether the other vessel has wind on port or starboard?
• Two short blasts from a vessel when another vessel is in sight indicates that the signaling vessel is ...
• You are in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must ...
• A lantern that combines side lights may be shown on a vessel of what length?
• A vessel nearing a bend or an area of a channel or fairway where other vessels may be obscured by an intervening obstruction shall sound...
• Which general rule applies to traffic separation schemes?
• In the context of international navigation rules, the term 'constrained by her draft' describes a vessel that is ...
• Under international rules, at night a power-driven vessel underway of less than 7 meters in length with maximum speed not exceeding 7 knots may show, as a minimum, which light?
• What lights must sailboats show when underway at night?
• Not under command at night is indicated by how many red lights?
• During daylight, which dayshape indicates a vessel transferring provisions or cargo at sea?
• A towing vessel pushing a barge ahead and rigidly connected in a composite unit shall show the lights of ...
• If your radar shows a vessel ahead on a collision course about 3 miles away and the situation is a meeting, what action should you take?
• When determining a vessel's speed, a safe speed must be maintained at what times?
• Two short blasts on a vessel's whistle indicate that the vessel is
• If a vessel hears a fog signal forward of her beam and has not determined risk exists, to what speed should she reduce?
• You are meeting another vessel head-on and sound one short blast as a passing signal. The other vessel answers with two short blasts. What should be your next action?
• Which vessel is NOT to be regarded as a vessel restricted in her ability to maneuver?
• What dayshape must be shown by a vessel over 20 meters fishing which has gear extending more than 150 meters horizontally outward from it?
• A towing light is a yellow light having the same characteristics as which light?
• Which situation would be a "special circumstance" under the Rules?
• During daylight, a vessel with a tow over 200 meters displays which dayshape?
• What is the minimum length of a power-driven vessel that must show forward and after masthead lights?
• What dayshape is shown by a vessel being towed that is partly submerged?
• In a crossing situation where another vessel approaches from your starboard beam while you are not making way, which statement is true?
• You are in charge of a stand-on vessel in a crossing situation. The other vessel is 1.5 miles to port and you believe risk of collision exists. What should you do?
• The stand-on vessel may take action to avoid collision when the give-way vessel is not taking appropriate action.
• When two vessels are in a composite unit, the lights are shown as which of the following?
• One cone with its apex upwards is used as a dayshape for which vessel condition?
• What determines if a vessel is "restricted in her ability to maneuver"?
• A vessel sounding a fog signal of one short, one prolonged, and one short blast indicates that the vessel is ...
• Which option correctly states the sternlight's viewing arc on each side of the stern?
• Under international rules, if a vessel is described as constrained by her draft, what propulsion type does she have?
• Under Inland Navigation Rules, a vessel of less than 20 meters in length at anchor at night in a special inland anchorage area designated by the Secretary must...
• In a narrow channel, the vessel should keep to the limit on which side of the channel?
• Your power-driven vessel is underway when you sight a sailing vessel on your port bow. Which vessel is the stand-on vessel?
• A vessel being towed at night must show...
• Which term describes a vessel restricted in her ability to maneuver?
• The arc of visibility for sidelights is from right ahead to 22.5° abaft the beam.
• Which vessel is, by definition, unable to keep out of the way of another vessel?
• A vessel described as constrained by her draft is best categorized as which type?
• When in sight of another vessel, any action taken to avoid collision must which of the following?
• Which vessel may combine her sidelights and sternlight in one lantern on the fore and aft centerline of the vessel?
• What signal shall a power-driven vessel sound when making way in fog?
• You sight another power-driven vessel dead-ahead showing both the red and green sidelights. The required action would be to...
• In fog, which statement about fog signals and collision avoidance is true?
• Select the correct statement about a vessel constrained by her draft.
• A vessel proceeding downstream in a narrow channel on the Great Lakes, Western Rivers, or waters specified by the Secretary sights another vessel moving upstream. Which vessel has the right of way?
• Which signal combination indicates the vessel is towing?
• Under the Rules, any vessel may slacken her speed, stop, or reverse her engines to...
• You are approaching another vessel and will pass starboard to starboard without danger if no course changes are made. You should...
• In the context of fishing operations, which condition would classify a vessel as engaged in fishing?
• Where do the International Rules of the Road apply?
• Regarding a vessel equipped with operational radar, which statement is true?
• Which statement correctly describes a vessel constrained by her draft?
• An anchor ball need NOT be exhibited by an anchored vessel if she is...
• What dayshape must be shown by a vessel over 20 meters fishing which has gear extending more than 150 meters horizontally outward from it?
• If it becomes necessary for a stand-on vessel to take action to avoid collision, she shall not, if possible, what maneuver?
• In the Rules, what does the word 'breadth' mean?
• The rule regarding lookouts applies in which conditions?
• A vessel displaying three red lights in a vertical line at night and a black cylinder dayshape is indicating which status?
• Which craft would be considered a power-driven vessel under the Rules?
• Choose the correct characterization of a vessel constrained by her draft.
• In a crossing scenario, what is the proper sequence before taking avoiding action?
• Which vessels sound maneuvering signals on inland waters?
• In an overtaking situation, which vessel is obligated to keep clear?
• A "head on" situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and...
• Which daylight signal indicates a vessel not under command?
• Which vessel shall avoid impeding the safe passage of a vessel constrained by her draft?
• A 'flashing light', by the definition given in the rules, is a light that ...
• A vessel underway and making way in fog shall sound every two minutes...
• Power-driven vessels must keep out of the way of sailing vessels except... when the sailing vessel is overtaking.
• What is used to show the presence of a partly submerged object being towed?
• A vessel servicing a pipeline during the day shall display...
• A power-driven vessel underway shall keep out of the way of a vessel not under command, restricted in her ability to maneuver, or engaged in fishing. Which category is specifically cited as requiring avoidance?
• Which signal sequence is used by the overtaking vessel when passing on the other vessel's port side?
• If a tug and barge are engaged in towing at night and the tow is not a composite unit, how many towing lights should be displayed aft?
• A vessel is "in sight" of another vessel when
• In a crossing between two power-driven vessels, the vessel which must keep out of the way is the one that has the other on its starboard.
• What is true about the single towing light when towing astern?
• If a vessel hears a fog signal forward of her beam and has not determined whether risk exists, to what speed should she reduce?
• Under the Inland Navigation Rules, what is the meaning of a one short blast signal used when meeting another vessel?
• Which statement is true concerning a vessel equipped with operational radar?
• In an approved 'special anchorage area', how many white anchor lights must a barge longer than 50 meters show when anchored?
• A vessel not under command shall display...
• A vessel engaged in fishing must display a light directed toward gear extending more than 150 meters. What color is this light?
• In a narrow channel, a signal of intent, which must be answered by the other vessel, is sounded by a vessel...
• In the NAVIGATION RULES, a vessel not under command is defined as a vessel which
• Which of the following is the true statement about a vessel constrained by her draft?
• What is the minimum length of an anchored vessel that is required to show a white light forward and aft?
• A towing light has the same characteristics as which other navigational light?
• Which statement about seaplanes and the term Vessel is true?
• When a vessel uses lights beyond those prescribed by the Rules, what must be preserved?
• In fog, you observe on radar a vessel about 2 miles off your port bow with risk of collision. What should you do?
• What is true about operating in fog when other vessels are detected by radar?
• In a crossing, which behavior best describes a stand-on vessel?
• Maneuvering signals shall be sounded on inland waters by which vessels?
• What is the purpose of radar on a vessel?
• When determining safe speed, which of the following factors must be considered?
• Which factor is listed as one to be taken into account when determining safe speed?
• While underway and in sight of another vessel, less than half a mile away, you put your engines on astern propulsion. Which statement concerning whistle signals is TRUE?