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.


137: INLAND ONLY A vessel displaying an alternating red and yellow light is __________.


150: INLAND ONLY A power-driven vessel, when leaving a dock or berth, must sound what signal?


208: INTERNATIONAL ONLY A single vessel being towed alongside shall show __________.


250: INLAND ONLY You are on a power-driven vessel "I" as shown. Vessel "II" is a power-driven vessel engaged in fishing that will pass within 1/2 a mile of your vessel. You sound one short blast on the whistle. Vessel "II" does not sound any signal. Which action should you take? (DIAGRAM 36 )

    N a. Hold course and speed without giving a signal.
    Y b. Sound the danger signal and reduce speed.
    N c. Sound one short blast, reduce speed and turn to starboard.
    N d. Sound two short blasts and change course to port.

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

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

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

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

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

    N a. yellow flashing light
    Y b. red sidelight
    N c. green sidelight
    N d. stern light

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

    N a. yellow flashing light
    Y b. red sidelight
    N c. green sidelight
    N d. stern light

389: BOTH INTERNATIONAL & INLAND You see ONLY the light shown. This could be a vessel __________. (DIAGRAM 80 )

    N a. not under command
    N b. engaged in fishing
    Y c. under oars
    N d. towing

4162: BOTH INTERNATIONAL & INLAND A vessel at night, displaying the lights shown is __________. (DIAGRAM 83 )

    N a. fishing
    Y b. not under command
    N c. towing
    N d. being towed

4203: BOTH INTERNATIONAL & INLAND If you hear the firing of a gun at one minute intervals from another vessel, this indicates that __________.

    N a. the gun is being used to sound passing signals
    Y b. the vessel is in distress
    N c. all vessels are to clear the area
    N d. all is clear and it is safe to pass

4271: BOTH INTERNATIONAL & INLAND A tug is towing three manned barges in line in fog. The third vessel of the tow should sound __________.

    N a. no fog signal
    N b. one prolonged and two short blasts
    Y c. one prolonged and three short blasts
    N d. one prolonged, one short and one prolonged blast

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

4293: BOTH INTERNATIONAL & INLAND Which vessel is to sound a fog signal of one prolonged followed by two short blasts?

    N a. A vessel not under command
    N b. A sailing vessel underway
    N c. A vessel restricted in its ability to maneuver, at anchor
    Y d. All of the above

4327: BOTH INTERNATIONAL & INLAND Two vessels are approaching each other near head on. What action should be taken to avoid collision?

    N a. The first vessel to sight the other should give way.
    N b. The vessel making the slower speed should give way.
    Y c. Both vessels should alter course to starboard.
    N d. Both vessels should alter course to port.

4330: BOTH INTERNATIONAL & INLAND While underway in fog, you hear a short blast, a prolonged blast, and a short blast of a whistle. This signal indicates a __________.

    N a. vessel towing in fog
    N b. sailboat underway in fog
    N c. vessel being towed in fog
    Y d. vessel anchored in fog

4352: BOTH INTERNATIONAL & INLAND What is the minimum vessel length which must show two white masthead lights, one forward and one aft, when underway at night?

    N a. 7 meters
    N b. 20 meters
    Y c. 50 meters
    N d. 100 meters

4371: BOTH INTERNATIONAL & INLAND A head-on situation at night is one in which you see __________.

    N a. one sidelight of a vessel ahead of you
    N b. one sidelight and a masthead light of a vessel ahead of you
    N c. one sidelight, a masthead light, and a range light of a vessel ahead of you
    Y d. both sidelights of a vessel dead ahead of you

4374: BOTH INTERNATIONAL & INLAND A vessel aground would show the same day-shape as a __________.

    N a. vessel towing a submerged object
    N b. dredge underway and dredging
    N c. hydrographic survey vessel at anchor and surveying
    Y d. None of the above

4445: BOTH INTERNATIONAL & INLAND Which vessel must show a towing light above the stern light?

    N a. A vessel pushing three barges ahead
    N b. A vessel towing alongside
    Y c. A vessel with a 150-meter tow astern
    N d. None of the above

4642: BOTH INTERNATIONAL & INLAND By radar alone, you detect a vessel ahead on a collision course, about 3 miles distant. Your radar plot shows this to be a meeting situation. You should __________.

    N a. turn to port
    Y b. turn to starboard
    N c. maintain course and speed and sound the danger signal
    N d. maintain course and speed and sound no signal

4660: BOTH INTERNATIONAL & INLAND In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should __________.

    N a. stop your engines
    N b. sound the danger signal at two-minute intervals
    N c. hold course and speed until the other vessel is sighted
    Y d. take avoiding action as soon as possible

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

4847: BOTH INTERNATIONAL & INLAND The rules require which factor to be taken into account when determining safe speed?

    N a. The construction of the vessel
    N b. The experience of the vessel's crew
    Y c. The location of vessels detected by radar
    N d. All of the above

4857: BOTH INTERNATIONAL & INLAND A vessel approaching a narrow channel shall __________.

    Y a. avoid crossing the channel if it impedes another vessel navigating in the channel
    N b. not overtake any vessels within the channel
    N c. keep as close as possible to the edge of the channel on her port side
    N d. anchor only in the middle of the channel

4861: BOTH INTERNATIONAL & INLAND When navigating in thick fog with the radar on, you should __________.

    N a. station the look-out in the wheelhouse to keep a continuous watch on the radar
    N b. secure the sounding of fog signals until a vessel closes within five miles
    Y c. station a look-out as low down and far forward as possible
    N d. keep the radar on the shortest available range for early detection of approaching vessels

4864: BOTH INTERNATIONAL & INLAND Which vessel shall NOT impede the passage of a vessel which can safely navigate only within a narrow channel or fairway?

    N a. A vessel dredging
    Y b. A sailing vessel
    N c. A vessel servicing an aid to navigation
    N d. All of the above

8078: INTERNATIONAL ONLY Vessel "A" is overtaking vessel "B" on open waters as shown and will pass without changing course. Vessel "A" __________. (DIAGRAM 17 )

    Y a. need not sound any whistle signals
    N b. should sound two short blasts
    N c. should sound the danger signal
    N d. should sound one long blast

8087: INTERNATIONAL ONLY Lighting requirements in inland waters are different from those for international waters for __________.

    Y a. barges being pushed ahead
    N b. vessels restricted in their ability to maneuver
    N c. vessels towing astern
    N d. barges being towed astern

8126: INTERNATIONAL ONLY A light used to signal passing intentions must be an __________.

    N a. all-round white or yellow light
    N b. all-round yellow light only
    Y c. all-round white light only
    N d. Any colored light is acceptable.