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.


35: INLAND ONLY You are on vessel "B" and vessel "A" desires to overtake you on your starboard side as shown. After the vessels have exchanged one blast signals, you should __________. (DIAGRAM 9 )


194: BOTH INTERNATIONAL & INLAND You are on vessel "A" and proceeding down a narrow channel as shown. You can only navigate within the channel and vessel "B" is crossing so as to involve risk of collision. Which action would be most prudent? (DIAGRAM 40 )


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


337: 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. Vessel "B" should sound __________. (DIAGRAM 42 )

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

343: 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"
    Y b. "I intend to leave you on my port side"
    N c. "I am altering my course to starboard"
    N d. None of the above

358: 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. Vessel "B" is the __________. (DIAGRAM 42 )

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

4009: BOTH INTERNATIONAL & INLAND Your 15-meter tug is underway and crossing a deep and narrow channel. A large container vessel is off your port bow on a steady bearing. Which statement is TRUE concerning this situation?

    N a. You should maintain course and speed.
    N b. The container vessel is the stand-on as it is the larger vessel.
    Y c. You are not to impede the safe passage of the container vessel in the channel.
    N d. None of the above

4022: BOTH INTERNATIONAL & INLAND A sailing vessel underway may exhibit __________.

    Y a. a red light over a green light at the masthead
    N b. a green light over a red light at the masthead
    N c. two white lights in a vertical line at the stern
    N d. an all-round white light at the bow

4145: BOTH INTERNATIONAL & INLAND You are in charge of a 120-meter power-driven vessel at anchor in fog, sounding the required anchor signals. You hear the fog signal of a vessel underway off your port bow. You may sound __________.

    N a. at least five short and rapid blasts
    N b. two short blasts
    Y c. one short, one prolonged, and one short blast
    N d. three short blasts

4166: BOTH INTERNATIONAL & INLAND A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show __________.

    N a. three masthead lights in a vertical line instead of either the forward or after masthead light
    Y b. two masthead lights in a vertical line instead of either the forward or after masthead lights
    N c. two towing lights in a vertical line at the stern
    N d. a small white light aft of the funnel

4168: BOTH INTERNATIONAL & INLAND When a vessel signals her distress by means of a gun or other explosive signal, the firing should be at intervals of approximately __________.

    N a. 10 minutes
    Y b. 1 minute
    N c. 1 hour
    N d. 3 minutes

4255: BOTH INTERNATIONAL & INLAND A stand-on vessel in a crossing situation is allowed to take action when __________.

    N a. on a collision course
    N b. the vessels will pass within one mile
    Y c. it becomes apparent to her that the give-way vessel is not taking appropriate action
    N d. the relative speed of the vessels indicates collision in less than six minutes

4319: BOTH INTERNATIONAL & INLAND Which statement about a 25-meter auxiliary sailboat is TRUE?

    N a. The sidelights and stern light may be combined in one lantern.
    N b. When operating under sail, her fog signal would consist of one prolonged blast.
    N c. She may show a green light over a red light at the masthead.
    Y d. She must show fixed sidelights.

4340: BOTH INTERNATIONAL & INLAND While underway and making way your vessel enters fog. Which fog signal should you sound every two minutes?

    Y a. One prolonged blast
    N b. Two prolonged blasts
    N c. Three short blasts
    N d. A prolonged blast and three short blasts

4405: BOTH INTERNATIONAL & INLAND A vessel underway but not making way and fishing other than trawling will show which lights?

    N a. A white light over a red light
    Y b. A red light over a white light
    N c. A white light over a red light, sidelights, and a stern light
    N d. A red light over a white light, sidelights, and a stern light

4417: BOTH INTERNATIONAL & INLAND What describes a head-on situation?

    N a. Seeing a vessel displaying both sidelights ONLY dead ahead
    N b. Seeing two forward white towing identification lights in a vertical line on a towing vessel directly ahead
    N c. Seeing both sidelights of a vessel directly off your starboard beam
    Y d. Seeing both sidelights and masthead light(s) of a vessel dead ahead

4434: BOTH INTERNATIONAL & INLAND Which statement correctly applies to a situation where a sailing vessel is overtaking a power-driven vessel?

    N a. The power-driven vessel must keep out of the way of the sailing vessel.
    N b. A "special circumstance" situation exists.
    Y c. The sailing vessel must keep out of the way of the power- driven vessel.
    N d. The vessel which has the other vessel to the right must keep out of the way.

4435: BOTH INTERNATIONAL & INLAND Which procedure(s) shall be used to determine risk of collision?

    N a. Watching the compass bearing of an approaching vessel
    N b. Systematic observation of objects detected by radar
    N c. Long-range radar scanning
    Y d. All of the above

4534: BOTH INTERNATIONAL & INLAND A vessel towing where the tow prevents her from changing course shall carry __________.

    N a. only the lights for a vessel towing
    N b. only the lights for a vessel restricted in her ability to maneuver
    Y c. the lights for a towing vessel and the lights for a vessel restricted in her ability to maneuver
    N d. the lights for a towing vessel and the lights for a vessel not under command

4578: BOTH INTERNATIONAL & INLAND A "short blast" on the whistle has a duration of __________.

    Y a. 1 second
    N b. 4 to 6 seconds
    N c. 8 to 12 seconds
    N d. 12 to 15 seconds

4591: BOTH INTERNATIONAL & INLAND A vessel using a traffic separation scheme shall __________.

    N a. only anchor in the separation zone
    N b. cross a traffic lane at as small an angle as possible
    Y c. avoid anchoring in areas near the termination of the scheme
    N d. utilize the separation zone for navigating through the scheme if she is impeding other traffic due to her slower speed

4624: BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown could be a vessel __________. (DIAGRAM 56 )

    N a. towing a barge alongside
    Y b. underway and laying cable
    N c. at anchor and dredging
    N d. underway and carrying dangerous cargo

4644: BOTH INTERNATIONAL & INLAND A vessel engaged in trawling will show identification lights of __________.

    N a. a red light over a white light
    N b. a white light over a red light
    Y c. a green light over a white light
    N d. two red lights in a vertical line

4714: BOTH INTERNATIONAL & INLAND Which vessel would exhibit sidelights when underway and not making way?

    N a. A vessel not under command
    Y b. A vessel pushing ahead
    N c. A vessel engaged in dredging
    N d. A vessel trawling

4833: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning a "vessel engaged in fishing"?

    N a. The vessel is classified as "restricted in her ability to maneuver".
    N b. Her gear will not affect the vessel's maneuverability.
    Y c. The vessel may be using nets, lines, or trawls.
    N d. She sounds the same fog signal as a vessel underway but stopped and making no way.

4848: BOTH INTERNATIONAL & INLAND The Rules state that certain factors are to be taken into account when determining safe speed. One of the factors is the __________.

    N a. radio communications that are available
    N b. maximum speed of your vessel
    N c. temperature
    Y d. current

6500: BOTH INTERNATIONAL & INLAND A towing vessel and her tow are severely restricted in their ability to change course. When making way, the towing vessel will show ONLY __________.

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

8058: INTERNATIONAL ONLY Which vessel is to keep out of the way of the others?

    N a. A vessel constrained by her draft
    N b. A vessel engaged in underwater operations
    Y c. A vessel engaged in trawling
    N d. A vessel not under command

8080: INTERNATIONAL ONLY Which signal is sounded ONLY by a vessel in sight of another?

    Y a. One short blast on the whistle
    N b. Four short blasts on the whistle
    N c. One prolonged blast on the whistle
    N d. One short, one prolonged, and one short blast on the whistle

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