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.


24: BOTH INTERNATIONAL & INLAND Which of the day-shapes shown would you show on the after end of an inconspicuous partially submerged vessel or object being towed less than 200 meters in length? (DIAGRAM 16 )


99: INLAND ONLY A power-driven vessel when pushing ahead or towing alongside on the Western Rivers (above the Huey P. Long Bridge on the Mississippi River) shall exhibit __________.


113: INLAND ONLY At night, a barge moored in a slip used primarily for mooring purposes shall __________.


117: INLAND ONLY Which is a characteristic of a "special flashing light"?

    N a. It is required for all vessels being pushed ahead as part of a composite unit.
    Y b. It must show through an arc of not less than 180° nor more than 225°.
    N c. It must be of the same character and construction as the masthead light.
    N d. All of the above

126: INLAND ONLY For the purpose of the Inland Navigation Rules, the term "Inland Waters" includes __________.

    N a. the waters surrounding any islands of the U.S.
    Y b. the Great Lakes on the United States side of the boundary
    N c. the coastline of the United States, out to one mile offshore
    N d. any lakes within state boundaries

165: BOTH INTERNATIONAL & INLAND You are on a vessel heading due south and see the lights shown one point on your port bow. This vessel could be heading __________. (DIAGRAM 51 )

    N a. SE
    N b. NE
    N c. SW
    Y d. NW

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 )

    N a. Back down and allow vessel "B" to cross ahead.
    N b. Alter course to starboard to give him more room.
    N c. Maintain course and speed.
    Y d. Sound the danger signal and take evasive action.

209: INLAND ONLY A single vessel being towed alongside shall show __________.

    N a. one all-round white light
    N b. sidelights and a stern light
    N c. only the outboard sidelight and a stern light
    Y d. a special flashing light, sidelights, and a stern light

240: BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown and will pass without changing course. Which light will vessel "A" observe on vessel "B"? (DIAGRAM 17 )

    N a. yellow towing light
    Y b. white stern light
    N c. green sidelight
    N d. None of the above

284: INLAND ONLY While underway you sight the lights shown with the yellow lights flashing. The lights displayed are from a __________. (DIAGRAM 81 )

    N a. vessel aground
    N b. mine clearance vessel
    N c. vessel not under command
    Y d. dredge pipeline

301: BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown is a vessel __________. (DIAGRAM 79 )

    N a. engaged in submarine operations
    N b. dredging
    N c. engaged in fishing
    Y d. towing astern

312: INLAND ONLY You see the lights shown while proceeding in a channel. What should you do? (DIAGRAM 85 )

    N a. Proceed at full see speed through the two sets of double red lights.
    N b. Stop the vessel and await the red lights to change to green.
    Y c. Slow down and pass between the two sets of double red lights.
    N d. None of the above

320: BOTH INTERNATIONAL & INLAND Which dayshape(s) would be displayed by the vessel engaged in the operation indicated by the lights shown. (DIAGRAM 82 )

    N a. a cylinder
    N b. a ball, a diamond and another ball
    Y c. two cones with apexes together
    N d. a diamond

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

    N a. white masthead light
    N b. green sidelight
    N c. stern light
    Y d. None of the above

338: 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 )

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

347: 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" should __________. (DIAGRAM 42 )

    N a. sound the danger signal and slow to moderate speed
    N b. alter course to the right or slowdown
    N c. sound one short blast and maintain course and speed
    Y d. None of the above

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

    Y a. give-way vessel
    N b. stand-on vessel
    N c. overtaking vessel
    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

4076: BOTH INTERNATIONAL & INLAND If a rowboat underway does NOT show the lights specified for a sailing vessel underway, it shall show a __________.

    N a. white light from sunset to sunrise
    N b. combined lantern showing green to starboard and red to port and shown from sunset to sunrise
    N c. combined lantern showing green to starboard and red to port and shown in sufficient time to prevent collision
    Y d. white light shown in sufficient time to prevent collision

4140: BOTH INTERNATIONAL & INLAND The rule regarding look-outs applies __________.

    N a. in restricted visibility
    N b. between dusk and dawn
    N c. in heavy traffic
    Y d. All of the above

4165: BOTH INTERNATIONAL & INLAND Which statement is TRUE of a 30-meter sailing vessel underway?

    Y a. She must show sidelights and a stern light in restricted visibility.
    N b. She may show an all-round white light at the top of the mast.
    N c. She need not show a stern light if she is showing all-round lights on the mast.
    N d. If she is using propelling machinery, she shall show forward a shape consisting of two cones, apexes together.

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

4376: BOTH INTERNATIONAL & INLAND A power-driven vessel "not under command" at night must show her sidelights when __________.

    Y a. making headway
    N b. making no headway
    N c. moored to a buoy
    N d. at anchor

4439: BOTH INTERNATIONAL & INLAND Signals required for vessels aground include __________.

    N a. by night, the anchor lights for a vessel of her length, and three red lights in a vertical line
    N b. a short, a prolonged, and a short blast
    Y c. by day, three black balls in a vertical line
    N d. All of the above

4463: BOTH INTERNATIONAL & INLAND You are underway on vessel "B" approaching vessel "A", as shown. You are unable to see any sidelights on vessel "A". This is a(n) __________. (DIAGRAM 38 )

    N a. meeting situation
    N b. crossing situation
    Y c. overtaking situation
    N d. special circumstances situation

4673: BOTH INTERNATIONAL & INLAND Which vessel may sound the danger signal?

    N a. Either vessel in a meeting situation
    N b. The give-way vessel in a crossing situation
    N c. A vessel at anchor
    Y d. All of the above

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

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

8111: INTERNATIONAL ONLY Your vessel is backing out of a slip in a harbor. Visibility is restricted. You should sound __________.

    Y a. one prolonged blast only
    N b. one prolonged blast followed by three short blasts when the last line is taken aboard
    N c. one prolonged blast followed by three short blasts when leaving the slip
    N d. the danger signal

8128: INTERNATIONAL ONLY Which statement is TRUE, according to the Rules?

    Y a. 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 b. A vessel not under command shall keep out of the way of a vessel restricted in her ability to maneuver.
    N c. A vessel engaged in fishing shall keep out of the way of a sailing vessel.
    N d. A vessel not under command shall keep out of the way of a vessel engaged in fishing.