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.


50: INLAND ONLY Vessels "A" and "B" are meeting on a river as shown and will pass about 1/4 mile apart. Which statement is TRUE? (DIAGRAM 29 )


228: INLAND ONLY A vessel engaged in public safety activities may display an alternately flashing red and yellow light. This special light may be used by a vessel engaged in __________.


279: INLAND ONLY While underway you sight the lights shown with the yellow lights flashing. The lights displayed should be __________. (DIAGRAM 81 )


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

370: INLAND ONLY If a towing vessel and her tow are severely restricted in their ability to deviate from their course, lights in addition to the towing identification lights must be shown. These additional lights shall be shown if the tow is __________.

    N a. pushed ahead
    N b. towed alongside
    N c. towed astern
    Y d. All of the above

4017: BOTH INTERNATIONAL & INLAND A 200-meter vessel is aground in fog. Which signal is optional?

    N a. A bell signal
    N b. A gong signal
    Y c. A whistle signal
    N d. All of the above

4056: BOTH INTERNATIONAL & INLAND A sailing vessel with the wind abaft the beam is navigating in restricted visibility. She should sound __________.

    N a. three short blasts
    N b. one prolonged blast
    Y c. one prolonged and two short blasts
    N d. two prolonged blasts

4075: BOTH INTERNATIONAL & INLAND You are approaching another vessel. She is about one mile distant and is on your starboard bow. You believe she will cross ahead of you. She then sounds a whistle signal of five short blasts. You should __________.

    N a. answer the signal and hold course and speed
    N b. reduce speed slightly to make sure she will have room to pass
    Y c. make a large course change, and slow down if necessary
    N d. wait for another whistle signal from the other vessel

4078: BOTH INTERNATIONAL & INLAND You are making headway in fog and hear a fog signal of two prolonged blasts on your starboard quarter. You should __________.

    N a. stop your vessel
    N b. change course to the left
    N c. change course to the right
    Y d. hold your course and speed

4127: BOTH INTERNATIONAL & INLAND A vessel will NOT show sidelights when __________.

    N a. underway but not making way
    N b. making way, not under command
    Y c. not under command, not making way
    N d. trolling underway

4192: BOTH INTERNATIONAL & INLAND In restricted visibility, a vessel fishing with nets shall sound at intervals of two minutes __________.

    N a. one prolonged blast
    Y b. one prolonged followed by two short blasts
    N c. one prolonged followed by three short blasts
    N d. two prolonged blasts in succession

4211: BOTH INTERNATIONAL & INLAND In order for a stand-on vessel to take action in a situation, she must determine that the other vessel __________.

    N a. is restricted in her ability to maneuver
    N b. has sounded the danger signal
    Y c. is not taking appropriate action
    N d. has not changed course since risk of collision was determined

4273: BOTH INTERNATIONAL & INLAND Which vessel is NOT classified as "restricted in her ability to maneuver"?

    N a. A vessel picking up a navigation mark
    N b. A vessel transferring cargo while underway
    Y c. A vessel whose anchor is fouled
    N d. A vessel in a towing operation that restricts the ability of the vessel and her tow to change their course

4283: BOTH INTERNATIONAL & INLAND What is NOT a distress signal?

    N a. A continuous sounding of the fog horn
    N b. Firing a gun every minute
    Y c. Five or more short rapid blasts on the whistle
    N d. A square flag and ball flown from the mast

4296: BOTH INTERNATIONAL & INLAND Which power-driven vessel is NOT required to carry a light in the position of the after masthead light?

    N a. A pushing vessel and a vessel being pushed, in a composite unit and 100 meters in length
    N b. A vessel of 60 meters in length towing astern
    Y c. A vessel of 45 meters in length trolling
    N d. Any vessel constrained by her draft

4313: BOTH INTERNATIONAL & INLAND While underway at night, you sight a vessel ahead displaying the lights shown. How should the vessels pass? (DIAGRAM 71 )

    Y a. Both vessels should alter course to starboard and pass port to port.
    N b. Both vessels should alter course to port and pass starboard to starboard.
    N c. Your vessel should hold course and speed and the other vessel should keep clear.
    N d. You should sound an appropriate overtaking signal.

4345: BOTH INTERNATIONAL & INLAND A vessel showing a green light over a white light in a vertical line above the level of the sidelights is __________.

    N a. engaged in underwater construction
    N b. under sail and power
    N c. a pilot vessel
    Y d. trawling

4389: BOTH INTERNATIONAL & INLAND An overtaking situation at night would be one in which one vessel sees which light(s) of a vessel ahead?

    N a. Masthead lights and sidelights
    N b. One sidelight, the masthead lights and stern light
    N c. Both sidelights
    Y d. Stern light

4390: BOTH INTERNATIONAL & INLAND What lights must sailboats show when underway at night?

    N a. One all-round white light
    N b. A stern light
    N c. Red and green sidelights
    Y d. Red and green sidelights and a stern light

4423: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning a "vessel engaged in fishing"?

    Y a. The vessel may be using nets, lines, or trawls.
    N b. The vessel may be trolling.
    N c. The vessel shows 2 lights in a vertical line, white over red.
    N d. The vessel sounds the same fog signal as a vessel underway, making no way.

4426: BOTH INTERNATIONAL & INLAND A power-driven vessel is underway in fog but stopped and making no way through the water. What is the required fog signal?

    N a. One prolonged blast at not more than one-minute intervals
    N b. Two prolonged blasts at not more than one-minute intervals
    N c. One prolonged blast at not more than two-minute intervals
    Y d. Two prolonged blasts at not more than two-minute intervals

4544: BOTH INTERNATIONAL & INLAND You are approaching another vessel on crossing courses. She is approximately half a mile distant and is presently on your starboard bow. You believe she will cross ahead of you. She then sounds a whistle signal of five short blasts. You should __________.

    N a. answer the signal and hold course and speed
    N b. reduce speed slightly to make sure she will have room to pass
    Y c. make a large course change, accompanied by the appropriate whistle signal, and slow down if necessary
    N d. wait for another whistle signal from the other vessel

4700: BOTH INTERNATIONAL & INLAND What does the word "length" refer to?

    N a. Length between the perpendiculars
    Y b. Length overall
    N c. Waterline length
    N d. Registered length

4734: BOTH INTERNATIONAL & INLAND A vessel may use any sound or light signals to attract the attention of another vessel as long as __________.

    N a. white lights are not used
    N b. red and green lights are not used
    Y c. the signal cannot be mistaken for a signal authorized by the Rules
    N d. the vessel signals such intentions over the radiotelephone

4737: BOTH INTERNATIONAL & INLAND You are approaching a narrow channel. Another vessel in the channel can only be navigated safely in that channel. You should __________.

    Y a. not cross the channel if you might impede the other vessel
    N b. hold your course and speed if she is on your port bow
    N c. sound three short blasts, and take all way off your vessel
    N d. sound two prolonged blasts followed by one short blast

4827: BOTH INTERNATIONAL & INLAND The Rules state that vessels may depart from the requirements of the Rules when __________.

    N a. operating in restricted visibility
    N b. operating in a narrow channel
    Y c. necessary to avoid immediate danger
    N d. the Master enters it in the ship's log

6510: BOTH INTERNATIONAL & INLAND You hear the fog signal of another vessel forward of your beam. Risk of collision may exist. You MUST __________.

    Y a. take all way off, if necessary
    N b. stop your engines
    N c. begin a radar plot
    N d. All of the above

6550: BOTH INTERNATIONAL & INLAND In a traffic separation scheme, when joining a traffic lane from the side, a vessel shall do so __________.

    Y a. at as small an angle as possible
    N b. as nearly as practical at right angles to the general direction of traffic flow
    N c. only in case of an emergency or to engage in fishing within the zone
    N d. never

8104: INTERNATIONAL ONLY Your vessel is constrained by her draft and operating in a narrow channel. Another vessel is crossing your course from starboard to port. You are in doubt as to her intentions. According to Rule 9, you __________.

    N a. should sound one short blast to indicate that you are holding course and speed
    N b. must sound one prolonged blast
    Y c. may sound the danger signal
    N d. are required to back down