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.


9: INLAND ONLY Which statement is TRUE concerning narrow channels?


26: INLAND ONLY A law enforcement boat may display a __________.


38: INLAND ONLY Your vessel is meeting another vessel head-on. To comply with the rules, you should exchange __________.


147: INLAND ONLY What characteristic must a light used to indicate passing intentions have?

    N a. It must be an alternating red and yellow light.
    N b. It must be an all-round white light.
    N c. It must be an all-round yellow light.
    Y d. It must be either an all-round white or an all-round yellow light.

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

253: INLAND ONLY Vessels "A" and "B" are meeting on a river as shown and will pass 1/4 mile apart. Which light(s) on the tug & barge will you see, if you are on vessel "A"? (DIAGRAM 41 )

    N a. a special flashing light
    N b. two white masthead lights in a vertical line
    N c. green sidelights
    Y d. All of the above

255: INTERNATIONAL ONLY Vessels "A" and "B" are meeting on a river as shown and will pass 1/4 mile apart. Which light on vessel "B" will you see if you are on vessel "A"? (DIAGRAM 41 )

    N a. special flashing yellow light
    N b. flashing blue light
    N c. two yellow towing lights
    Y d. None of the above

352: INLAND ONLY A commercial vessel engaged in public safety activities may display a(n) __________.

    N a. flashing blue light
    Y b. alternately flashing red and yellow light
    N c. flashing yellow light
    N d. alternately flashing blue and red light

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

4059: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning seaplanes on the water?

    N a. A seaplane must show appropriate lights but need not exhibit shapes.
    N b. A seaplane should exhibit the lights for a vessel constrained by her draft.
    N c. In situations where a risk of collision exists, a seaplane should always give way.
    Y d. A seaplane on the water shall, in general, keep well clear of all vessels.

4151: BOTH INTERNATIONAL & INLAND While underway in fog you hear a vessel sound one prolonged blast followed by two short blasts. What does this signal indicate?

    Y a. A vessel towing
    N b. A vessel being towed
    N c. A pilot vessel engaged on pilotage duty
    N d. A vessel aground

4210: BOTH INTERNATIONAL & INLAND A vessel being towed astern shall show at night __________.

    N a. the lights required for a power-driven vessel underway
    N b. only the required masthead lights
    N c. a stern light only
    Y d. sidelights and a stern light

4266: BOTH INTERNATIONAL & INLAND On open waters, a power-driven vessel shall keep out of the way of a __________.

    N a. vessel on her port side that is crossing her course
    N b. vessel that is overtaking her
    N c. seaplane on the water
    Y d. sailing vessel

4281: BOTH INTERNATIONAL & INLAND A vessel 30 meters in length and aground would display a day-shape consisting of __________.

    N a. a cylinder
    N b. one black ball
    N c. two black balls in a vertical line
    Y d. three black balls in a vertical line

4318: BOTH INTERNATIONAL & INLAND Which is NOT a distress signal?

    N a. Flames on a vessel
    Y b. Vertical motion of a white lantern at night
    N c. Code flags "November" and "Charlie"
    N d. Dye marker on the water

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.

4350: BOTH INTERNATIONAL & INLAND While underway in fog you hear the rapid ringing of a bell. What does this signal indicate?

    N a. A vessel backing down
    N b. A sailboat underway
    Y c. A vessel at anchor
    N d. A vessel drifting

4364: BOTH INTERNATIONAL & INLAND The whistle signal for a vessel operating astern propulsion is __________.

    N a. one long blast
    N b. one prolonged blast
    Y c. three short blasts
    N d. four or more short blasts

4400: BOTH INTERNATIONAL & INLAND When action to avoid a close quarters situation is taken, a course change alone may be the most effective action provided that __________.

    N a. it is done in a succession of small course changes
    N b. it is NOT done too early
    Y c. it is a large course change
    N d. the course change is to starboard

4468: BOTH INTERNATIONAL & INLAND You see a vessel displaying three lights in a vertical line. The highest and lowest lights are red and the middle light is white. She is also showing a white light at the stern, which is lower than the forward light. It could be a __________.

    Y a. survey vessel
    N b. vessel not under command
    N c. vessel aground
    N d. pilot vessel with port side to you

4500: BOTH INTERNATIONAL & INLAND Your power-driven vessel is stopped and making no way, but is not in any way disabled. Another vessel is approaching you on your starboard beam. Which statement is TRUE?

    N a. The other vessel must give way since your vessel is stopped.
    Y b. Your vessel is the give-way vessel in a crossing situation.
    N c. You should be showing the lights or shapes for a vessel not under command.
    N d. You should be showing the lights or shapes for a vessel restricted in her ability to maneuver.

4530: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning a partly submerged vessel being towed?

    N a. It must show a yellow light at each end.
    N b. It will show red lights along its length.
    Y c. A diamond shape will be carried at the aftermost extremity of the tow.
    N d. All of the above

4552: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning fog signals?

    N a. All fog signals for sailing vessels are to be given at intervals of not more than one minute.
    N b. A vessel not under command sounds the same fog signal as a vessel towed.
    N c. A pilot vessel underway and making way sounds the pilot identity signal and no other signal.
    Y d. A vessel aground may sound a whistle signal.

4609: BOTH INTERNATIONAL & INLAND In determining "safe speed", all of the following must be taken into account EXCEPT the __________.

    Y a. maximum horsepower of your vessel
    N b. presence of background lights at night
    N c. draft of your vessel
    N d. maneuverability of your 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

4676: BOTH INTERNATIONAL & INLAND You are underway in a narrow channel and are being overtaken by a vessel astern. The overtaking vessel sounds a signal indicating her intention to pass you on your starboard side. If such an action appears dangerous, you should sound __________.

    N a. one prolonged followed by one short blast
    N b. one prolonged, one short, one prolonged, and one short blast in that order
    Y c. five short and rapid blasts
    N d. three short and rapid blasts

4691: BOTH INTERNATIONAL & INLAND A 200-meter vessel is aground in fog. Which signal is optional?

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

4704: BOTH INTERNATIONAL & INLAND The masthead light may be located at other than the fore and aft centerline on a vessel __________.

    N a. less than 50 meters in length
    N b. less than 20 meters in length
    Y c. of special construction
    N d. engaged in trolling

4846: BOTH INTERNATIONAL & INLAND In determining "safe speed", the Rules list all of the following as factors which must be taken into account EXCEPT the __________.

    N a. limitations of radar equipment
    N b. presence of background lights at night
    Y c. maximum horsepower of your vessel
    N d. maneuverability of your vessel

8017: INTERNATIONAL ONLY In a narrow channel, a vessel trying to overtake another on the other vessel's port side, would sound a whistle signal of __________.

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