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.


6: INLAND ONLY A vessel displaying a flashing blue light is __________.


62: INLAND ONLY Which is TRUE of a vessel downbound with a following current when meeting an upbound vessel on the Western Rivers?


142: INLAND ONLY The special light for a vessel engaged in public safety activities must __________.


179: BOTH INTERNATIONAL & INLAND Which display of lights shown indicates a dredge underway and not dredging? (DIAGRAM 72 )

    N a. A
    Y b. B
    N c. C
    N d. D

191: INLAND ONLY At night, you see the lights shown. They are shown on a __________. (DIAGRAM 75 )

    N a. bow of a barge being pushed ahead
    N b. stern of a barge being towed astern
    N c. masthead of a tug towing astern
    Y d. stern of a tug pushing ahead

234: BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown. Which color light will vessel "A" observe on vessel "B"? (DIAGRAM 17 )

    N a. Green
    Y b. White
    N c. Flashing red
    N d. Yellow over yellow

275: INLAND ONLY While underway you sight the lights shown with the yellow lights flashing, you should __________. (DIAGRAM 81 )

    N a. wait until the vessel ahead crosses your bow
    Y b. pass between the two sets of vertical red lights
    N c. stop until the red lights turn green
    N d. proceed leaving all the lights on your starboard side

290: BOTH INTERNATIONAL & INLAND The tow shown is greater than 200 meters in length and severely restricted in her ability to deviate from her course. Which dayshape(s) would be displayed by day from the vessel(s)? (DIAGRAM 24 )

    N a. ball-diamond-ball on the towing vessel
    N b. diamond on the towing vessel
    N c. diamond on the barges
    Y d. All of the above

325: BOTH INTERNATIONAL & INLAND Diagram "B" shows the arc of visibility of a __________. (DIAGRAM 23 )

    N a. white masthead light
    N b. red sidelight
    Y c. green sidelight
    N d. stern light

368: BOTH INTERNATIONAL & INLAND Two power-driven vessels are crossing as shown. Vessel "A" sounds one short blast on the whistle. Vessel "A" is the __________. (DIAGRAM 42 )

    N a. stand-on vessel
    Y b. give-way vessel
    N c. overtaking vessel
    N d. None of the above

4048: BOTH INTERNATIONAL & INLAND If it becomes necessary for a stand-on vessel to take action to avoid collision, she shall NOT, if possible, __________.

    N a. decrease speed
    N b. increase speed
    Y c. turn to port for a vessel on her own port side
    N d. turn to starboard for a vessel on her own port side

4053: BOTH INTERNATIONAL & INLAND Two vessels meeting in a "head-on" situation are directed by the Rules to __________.

    Y a. alter course to starboard and pass port to port
    N b. alter course to port and pass starboard to starboard
    N c. decide on which side the passage will occur by matching whistle signals
    N d. slow to bare steerageway

4208: BOTH INTERNATIONAL & INLAND Five or more short blasts on a vessel's whistle indicates that she is __________.

    Y a. in doubt that another vessel is taking sufficient action to avoid a collision
    N b. altering course to starboard
    N c. altering course to port
    N d. the stand-on vessel and will maintain course and speed

4282: BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown is __________. (DIAGRAM 63 )

    Y a. towing astern
    N b. underway and more than 50 meters in length
    N c. broken down
    N d. fishing

4312: BOTH INTERNATIONAL & INLAND A power-driven vessel "not under command" at night must show which lights in a vertical line?

    N a. Three red
    Y b. Two red
    N c. Two white
    N d. Three white

4336: BOTH INTERNATIONAL & INLAND While underway and in sight of another vessel crossing less than .5 mile away, you put your engines full speed astern. 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.

4348: BOTH INTERNATIONAL & INLAND You are on vessel "A" pushing a barge ahead and meeting vessel "B" as shown. How should the vessels pass? (DIAGRAM 12 )

    Y a. Both vessels must alter course to starboard and pass port to port.
    N b. Both vessels must alter course to port and pass starboard to starboard.
    N c. Vessel "A" should maintain course and vessel "B" alter course.
    N d. The vessels should determine which will alter course by sounding whistle signals.

4362: BOTH INTERNATIONAL & INLAND A vessel underway and fishing shall keep out of the way of a __________.

    N a. power-driven vessel underway
    Y b. vessel not under command
    N c. vessel sailing
    N d. vessel engaged on pilotage duty

4372: BOTH INTERNATIONAL & INLAND You are the stand-on vessel in a crossing situation. If you think the give-way vessel is NOT taking sufficient action to avoid collision, you should sound __________.

    N a. one short blast and maintain course
    N b. two short blasts, alter to port, and pass astern
    N c. no signal and maneuver at will
    Y d. the danger signal

4379: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning risk of collision?

    N a. The stand-on vessel must keep out of the way of the other vessel when risk of collision exists.
    N b. Risk of collision always exists when two vessels pass within one mile of each other.
    N c. Risk of collision always exists when the compass bearing of an approaching vessel changes appreciably.
    Y d. Risk of collision may exist when the compass bearing of an approaching vessel is changing appreciably.

4398: BOTH INTERNATIONAL & INLAND A tugboat displaying the day-shape shown __________. (DIAGRAM 10 )

    N a. is at anchor
    N b. is not under command
    Y c. has a tow that exceeds 200 meters in length
    N d. has a tow that is carrying dangerous cargo

4505: BOTH INTERNATIONAL & INLAND Vessels of less than what length may not impede the passage of other vessels which can safely navigate only within a narrow channel or fairway?

    N a. 10 meters
    Y b. 20 meters
    N c. 30 meters
    N d. 40 meters

4583: BOTH INTERNATIONAL & INLAND An anchor ball need NOT be exhibited by an anchored vessel if she is __________.

    N a. under 50 meters in length, and anchored in an anchorage
    N b. over 150 meters in length
    N c. rigged for sail
    Y d. less than 7 meters in length, and not in or near an area where other vessels normally navigate

4585: BOTH INTERNATIONAL & INLAND While underway at night you are coming up on a vessel from astern. What lights would you expect to see?

    N a. Red and green sidelights
    N b. Two white lights
    N c. One white light and red and green sidelights
    Y d. One white light

4611: BOTH INTERNATIONAL & INLAND A vessel, which does not normally engage in towing operations, is towing a vessel in distress. She __________.

    Y a. need not show the lights for a vessel engaged in towing, if it is impractical to do so
    N b. may show the lights for a vessel not under command
    N c. must show a yellow light above the stern light
    N d. must show the lights for a vessel towing

4616: BOTH INTERNATIONAL & INLAND If your vessel is the stand-on vessel in a crossing situation __________.

    Y a. you must keep your course and speed
    N b. you may change course and speed as the other vessel must keep clear
    N c. the other vessel must keep her course and speed
    N d. both vessels must keep their course and speed

4667: BOTH INTERNATIONAL & INLAND While underway and in sight of another vessel, less than one half mile away, you put your engines on astern propulsion. Which statement concerning whistle signals is TRUE?

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

4684: BOTH INTERNATIONAL & INLAND You see a red sidelight bearing NW (315°). That vessel may be heading __________.

    N a. northwest (315°)
    N b. east (090°)
    Y c. southwest (225°)
    N d. west (270°)

4722: BOTH INTERNATIONAL & INLAND Which vessel, when anchored at night, is not required to show anchor lights?

    N a. A power-driven vessel
    N b. A vessel engaged in survey operations
    N c. A vessel engaged on pilotage duty
    Y d. A vessel engaged in fishing

4851: BOTH INTERNATIONAL & INLAND. In which situation would you consider a risk of collision to exist?

    N a. A vessel is one point on your starboard 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.
    Y c. A vessel is two points abaft your port beam, range decreasing, bearing constant.
    N d. A vessel is on your starboard quarter, range increasing, bearing is constant.