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.


29: INLAND ONLY A fleet of moored barges extends into a navigable channel. What is the color of the lights on the barges?


107: INLAND ONLY A power-driven vessel intends to overtake another power-driven vessel on the overtaken vessel's port side. What whistle signal should be sounded in order to state this intention?


139: INTERNATIONAL ONLY Which day-shape must you show on the forward end of an inconspicuous partially submerged vessel or object being towed more than 200 meters in length? (DIAGRAM 16 )


214: INTERNATIONAL ONLY At night, you sight the lights shown. What do the lights indicate? (DIAGRAM 55 )

    N a. A vessel fishing at anchor
    Y b. A tug with a tow alongside
    N c. A tug not under command
    N d. A pipeline

246: INLAND ONLY You are on vessel "A" as shown in a narrow channel. Vessel "B" sounds two short blasts. If you are in agreement you should __________. (DIAGRAM 32 )

    Y a. sound two short blasts
    N b. sound two prolonged followed by two short blasts
    N c. not answer the whistle signals from vessel "B"
    N d. None of the above

265: INTERNATIONAL ONLY You are on a power-driven vessel "I" as shown. Vessel "II" is a vessel engaged in fishing. The vessels will pass within 1/2 mile of each other. Which action should you take? (DIAGRAM 36 )

    N a. Hold course and speed without giving a signal.
    N b. Sound the danger signal and slow to moderate speed.
    Y c. Sound one short blast, turn to starboard.
    N d. Sound one short blast and hold course and speed.

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

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

4025: BOTH INTERNATIONAL & INLAND A sailing vessel with the wind abaft the beam is navigating in fog. 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

4057: BOTH INTERNATIONAL & INLAND You see a vessel displaying the code flag "LIMA" below which is a red ball. The vessel is __________.

    N a. trolling
    N b. getting ready to receive aircraft
    N c. aground
    Y d. in distress

4062: BOTH INTERNATIONAL & INLAND You are in charge of a power-driven vessel navigating at night. You sight the red sidelight of another vessel on your port bow. The other vessel's after masthead light is to the right of her forward masthead light. You should __________.

    Y a. hold course and speed
    N b. alter course to port
    N c. stop engines
    N d. sound the danger signal

4152: BOTH INTERNATIONAL & INLAND A power-driven vessel with a 150-meter stern tow shall display __________.

    N a. three masthead lights in a vertical line
    Y b. a towing light above the stern light
    N c. two towing lights in a vertical line
    N d. a red light over a white light at the masthead

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

4250: BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown is __________. (DIAGRAM 60 )

    Y a. towing
    N b. being towed
    N c. broken down
    N d. fishing

4265: BOTH INTERNATIONAL & INLAND While underway and pushing a barge ahead, your vessel enters a heavy rain storm. You should sound __________.

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

4562: BOTH INTERNATIONAL & INLAND In a crossing situation, the vessel which has the other on her own starboard side shall __________.

    Y a. if the circumstances of the case admit, avoid crossing ahead of the other
    N b. change course to port to keep out of the way
    N c. reduce her speed
    N d. All of the above

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

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

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

4595: BOTH INTERNATIONAL & INLAND Which vessel, when anchored at night, would NOT be required to show anchor lights?

    N a. A power-driven vessel
    N b. A vessel on pilotage duty
    Y c. A vessel dredging
    N d. A vessel restricted in her ability to maneuver

4639: BOTH INTERNATIONAL & INLAND At night you sight a vessel displaying a single green light. This is a __________.

    N a. vessel at anchor
    N b. small motorboat underway
    N c. vessel drifting
    Y d. sailing vessel

4646: BOTH INTERNATIONAL & INLAND By night, you sight the lights of a vessel engaged in underwater operations. If an obstruction exists on the port side of the vessel, it will be marked by __________.

    N a. a floodlight
    Y b. two red lights in a vertical line
    N c. a single red light
    N d. any visible lights

4739: BOTH INTERNATIONAL & INLAND Which statement is TRUE, according to the Rules?

    N a. A vessel not under command shall keep out of the way of a vessel restricted in her ability to maneuver.
    N b. A vessel not under command shall keep out of the way of a vessel engaged in fishing.
    Y c. A vessel engaged in fishing while underway shall, so far as possible, keep out of the way of a vessel restricted in her ability to maneuver.
    N d. A vessel engaged in fishing shall keep out of the way of a sailing vessel.

4819: BOTH INTERNATIONAL & INLAND Which breadth shown represents the breadth as defined in the Rules? (DIAGRAM 87 )

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

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

4865: BOTH INTERNATIONAL & INLAND Your 15-meter vessel is crossing a narrow channel and a large cargo vessel to starboard is within the channel and crossing your course. You should __________.

    N a. hold your course and speed
    N b. sound the danger signal
    Y c. keep out of the way of the cargo vessel
    N d. do not cross the channel

6540: BOTH INTERNATIONAL & INLAND A vessel may enter a traffic separation zone __________.

    N a. in an emergency
    N b. to engage in fishing within the zone
    N c. to cross the traffic separation scheme
    Y d. All of the above

8071: INTERNATIONAL ONLY Which vessel is NOT regarded as being "restricted in her ability to maneuver"?

    N a. A vessel servicing an aid to navigation
    N b. A vessel engaged in dredging
    N c. A towing vessel with tow unable to deviate from its course
    Y d. A vessel constrained by her draft

8073: INTERNATIONAL ONLY In a narrow channel, an overtaking vessel which intends to PASS on the other vessel's port side would sound __________.

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