USCG Rules of the Road: Master's License

This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.


103: INLAND ONLY Which light display would mark the opening in a pipeline where vessels could pass through?


178: BOTH INTERNATIONAL & INLAND Which display of lights shown indicates a 65-meter tug towing a barge astern, length of tow 120 meters? (DIAGRAM 72 )


258: INLAND ONLY Vessels "A" and "B" are meeting on a river as shown and will pass 1/4 mile apart. Which statement is TRUE? (DIAGRAM 41 )


316: BOTH INTERNATIONAL & INLAND At night a vessel displaying the lights as shown is __________. (DIAGRAM 82 )

    N a. a pilot boat
    N b. sailing
    Y c. fishing
    N d. anchored

342: INLAND ONLY Two power-driven vessels are crossing within a half a mile of each other as shown. Vessel "A" sounds one short blast on the whistle. This signal means __________. (DIAGRAM 42 )

    N a. "I intend to leave you on my starboard side"
    N b. "I am operating astern propulsion port side"
    N c. "I am altering my course to starboard"
    Y d. None of the above

354: INTERNATIONAL ONLY Two power-driven vessels are crossing within one half mile of each other as shown. Vessel "A" sounds one short blast of the whistle. This signal means __________. (DIAGRAM 42 )

    N a. "I intend to leave you on your starboard side"
    Y b. "I am altering my course to starboard"
    N c. "I am altering my course to port"
    N d. None of the above

4002: BOTH INTERNATIONAL & INLAND While underway in fog, you hear a prolonged blast from another vessel. This signal indicates a __________.

    N a. sailboat underway
    N b. vessel underway, towing
    Y c. power-driven vessel underway, making way
    N d. vessel being towed

4049: BOTH INTERNATIONAL & INLAND Your vessel is NOT making way, but is not in any way disabled. Another vessel is approaching you on your starboard beam. Which statement is TRUE?

    N a. The other vessel must give way since your vessel is stopped.
    Y b. Your vessel is the give-way vessel in a crossing situation.
    N c. You should be showing the lights or shapes for a vessel not under command.
    N d. You should be showing the lights or shapes for a vessel restricted in her ability to maneuver.

4055: BOTH INTERNATIONAL & INLAND When shall the stand-on vessel change course and speed?

    N a. The stand-on vessel may change course and speed at any time as it has the right-of-way
    N b. After the give-way vessel sounds one blast in a crossing situation
    Y c. When action by the give-way vessel alone cannot prevent collision
    N d. When the two vessels become less than half a mile apart

4074: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning a vessel of 75 meters in length, at anchor?

    N a. She must show an all-round white light forward.
    N b. She must show a second all-round white light aft.
    N c. She may use her working lights to illuminate her decks.
    Y d. All of the above

4142: BOTH INTERNATIONAL & INLAND A vessel engaged in fishing must display a light in the direction of any gear that extends outward more than 150 meters. The color of this light is __________.

    Y a. white
    N b. green
    N c. red
    N d. yellow

4146: BOTH INTERNATIONAL & INLAND When taking action to avoid collision, you should __________.

    Y a. make sure the action is taken in enough time
    N b. not make any large course changes
    N c. not make any large speed changes
    N d. All of the above

4158: BOTH INTERNATIONAL & INLAND A 25-meter vessel trawling will show the dayshape(s) consisting of __________.

    N a. a basket
    N b. two balls
    Y c. two cones, apexes together
    N d. a cone, apex downward

4164: BOTH INTERNATIONAL & INLAND While underway in fog you hear a whistle signal consisting of one prolonged blast followed immediately by two short blasts. This signal is sounded in fog by __________.

    N a. vessels at anchor, not engaged in fishing
    Y b. vessels underway and towing
    N c. vessels in danger
    N d. pilot vessels

4177: BOTH INTERNATIONAL & INLAND Your vessel is underway in reduced visibility. You hear the fog signal of another vessel about 30° on your starboard bow. If danger of collision exists, you must __________.

    N a. alter course to starboard to pass around the other vessel's stern
    N b. slow your engines and let the other vessel pass ahead of you
    Y c. reduce your speed to bare steerageway
    N d. alter course to port and pass the other vessel on its port side

4235: BOTH INTERNATIONAL & INLAND A vessel displaying the day-shapes shown is __________. (DIAGRAM 7 )

    Y a. broken down
    N b. fishing
    N c. a minesweeper
    N d. transferring dangerous cargo

4266: BOTH INTERNATIONAL & INLAND On open waters, a power-driven vessel shall keep out of the way of a __________.

    N a. vessel on her port side that is crossing her course
    N b. vessel that is overtaking her
    N c. seaplane on the water
    Y d. sailing vessel

4269: BOTH INTERNATIONAL & INLAND All of the following are distress signals under the Rules EXCEPT __________.

    Y a. International Code Signal "AA"
    N b. orange-colored smoke
    N c. red flares
    N d. the repeated raising and lowering of outstretched arms

4301: BOTH INTERNATIONAL & INLAND In which situation would risk of collision definitely exist?

    N a. A vessel is 22 degrees on your port bow, range increasing, bearing changing slightly to the right.
    N b. A vessel is broad on your starboard beam, range decreasing, bearing changing rapidly to the right.
    N c. A vessel is 22 degrees abaft your port beam, range increasing, bearing is constant.
    Y d. A vessel is on your starboard quarter, range decreasing, bearing is constant.

4315: INTERNATIONAL ONLY While underway and in sight of another vessel you put your engines on astern propulsion. Which statement concerning whistle signals is TRUE?

    Y a. You must sound three short blasts on the whistle.
    N b. You must sound one blast if backing to starboard.
    N c. You must sound whistle signals only if the vessels are meeting.
    N d. You need not sound any whistle signals.

4387: BOTH INTERNATIONAL & INLAND An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam?

    N a. 0°
    N b. 10°
    Y c. 22.5°
    N d. None of the above

4451: BOTH INTERNATIONAL & INLAND Every vessel should at all times proceed at a "safe speed". "Safe speed" is defined as that speed where __________.

    N a. you can stop within your visibility range
    Y b. you can take proper and effective action to avoid collision
    N c. you are traveling slower than surrounding vessels
    N d. no wake comes from your vessel

4471: BOTH INTERNATIONAL & INLAND A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to deviate from their course shall, when making way, show __________.

    N a. the masthead lights for a towing vessel
    N b. the lights for a vessel restricted in its ability to maneuver
    N c. sidelights, stern light and towing light
    Y d. All of the above

4580: BOTH INTERNATIONAL & INLAND You see a vessel displaying ONLY the lights shown. This could be a __________. (DIAGRAM 45 )

    Y a. pilot vessel less than 50 meters, underway and NOT engaged on pilotage duty
    N b. vessel engaged in fishing
    N c. vessel aground less than 50 meters
    N d. vessel engaged in dredging at anchor with an obstruction on one side

4619: BOTH INTERNATIONAL & INLAND Which vessel is NOT to impede the passage of a vessel which can only navigate safely within a narrow channel?

    N a. Any vessel less than 20 meters in length
    N b. Any sailing vessel
    N c. A vessel engaged in fishing
    Y d. All of the above

4628: BOTH INTERNATIONAL & INLAND A sailing vessel displaying the day-shape shown is indicating that she is __________. (DIAGRAM 35 )

    Y a. being propelled by power as well as sail
    N b. on a starboard tack
    N c. close-hauled and has difficulty maneuvering
    N d. fishing as well as sailing

4656: BOTH INTERNATIONAL & INLAND A vessel fishing at night, with gear extending more than 150 meters horizontally outwards, will show in the direction of the gear __________.

    Y a. one white light
    N b. two vertical white lights
    N c. one yellow light
    N d. two vertical yellow lights

8045: INTERNATIONAL ONLY You intend to overtake a vessel in a narrow channel, and you intend to pass along the vessel's port side. How should you signal your intention?

    N a. No signal is necessary.
    N b. Two prolonged blasts
    N c. Two short blasts
    Y d. Two prolonged followed by two short blasts

8096: INTERNATIONAL ONLY A vessel constrained by her draft may display __________.

    N a. three all-round red lights instead of the lights required for a power-driven vessel of her class
    N b. the same lights as a vessel restricted in her ability to maneuver
    Y c. three all-round red lights in addition to the lights required for a power-driven vessel of her class
    N d. the lights for a power-driven vessel which is not under command

8136: INTERNATIONAL ONLY A power-driven vessel pushing ahead or towing alongside will show sidelights, a stern light, and __________.

    N a. an all-round red light where it can best be seen
    N b. two yellow masthead lights in a vertical line
    Y c. two masthead lights in a vertical line
    N d. a single white light forward