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 )


90: INLAND ONLY Two vessels are in a starboard to starboard meeting situation and will pass well clear approximately 1/4 mile apart. Which action should each vessel take?


114: INLAND ONLY At night, what lights are required on barges moored in a group formation more than two barges wide?


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

140: INLAND ONLY You are the stand-on vessel in a crossing situation. The other vessel is showing an alternating red and yellow light. Which action should you take?

    Y a. Stand on.
    N b. Heave to.
    N c. Alter course to assist.
    N d. Yield the right-of-way.

153: BOTH INTERNATIONAL & INLAND You are underway at night and you sight the lights shown. You know these lights indicate a __________. (DIAGRAM 47 )

    N a. fishing vessel engaged in fishing
    N b. trawler dragging nets
    Y c. sailing vessel
    N d. dredge at work

270: INLAND ONLY Two power-driven vessels are meeting in a narrow channel as shown. Which statement is TRUE? (DIAGRAM 37 )

    N a. Whistle signals must be exchanged in all situations when passing within one half mile of each other.
    Y b. If agreement is reached by radiotelephone whistle signals are optional.
    N c. If agreement is reached by radiotelephone whistle signals must still be exchanged.
    N d. None of the above

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

4048: BOTH INTERNATIONAL & INLAND If it becomes necessary for a stand-on vessel to take action to avoid collision, she shall NOT, if possible, __________.

    N a. decrease speed
    N b. increase speed
    Y c. turn to port for a vessel on her own port side
    N d. turn to starboard for a vessel on her own port side

4051: BOTH INTERNATIONAL & INLAND The rules concerning lights shall be complied with in all weathers from sunset to sunrise. The lights __________.

    Y a. shall be displayed in restricted visibility during daylight hours
    N b. need not be displayed when no other vessels are in the area
    N c. shall be set at low power when used during daylight hours
    N d. need not be displayed by unmanned vessels

4112: BOTH INTERNATIONAL & INLAND A vessel, which is unable to maneuver due to some exceptional circumstance, shall exhibit __________.

    N a. during the day, three balls in a vertical line
    N b. during the day, three shapes, the highest and lowest being balls and the middle being a diamond
    Y c. when making way at night, two all-round red lights, sidelights, and a stern light
    N d. when making way at night, masthead lights, sidelights, and a stern light

4126: BOTH INTERNATIONAL & INLAND By day, when it is impracticable for a small vessel engaged in diving operations to display the shapes for a vessel engaged in underwater operations, she shall display __________.

    N a. three black balls in a vertical line
    N b. two red balls in a vertical line
    N c. a black cylinder
    Y d. a rigid replica of the International Code flag "A"

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

4304: BOTH INTERNATIONAL & INLAND A vessel being towed will show __________.

    N a. a forward masthead light
    Y b. sidelights and a stern light
    N c. a towing light
    N d. All of the above

4423: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning a "vessel engaged in fishing"?

    Y a. The vessel may be using nets, lines, or trawls.
    N b. The vessel may be trolling.
    N c. The vessel shows 2 lights in a vertical line, white over red.
    N d. The vessel sounds the same fog signal as a vessel underway, making no way.

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.

4469: BOTH INTERNATIONAL & INLAND A pilot vessel may continue to sound an identity signal in fog if she is __________.

    N a. aground
    Y b. at anchor
    N c. not under command
    N d. no longer on pilotage duty

4497: BOTH INTERNATIONAL & INLAND What is a requirement for any action taken to avoid collision?

    N a. When in sight of another vessel, any action taken must be accompanied by sound signals.
    N b. The action taken must include changing the speed of the vessel.
    Y c. The action must be positive and made in ample time.
    N d. All of the above

4559: BOTH INTERNATIONAL & INLAND A vessel aground at night is required to show two red lights in a vertical line as well as __________.

    N a. not under command lights
    N b. restricted in her ability to maneuver lights
    Y c. anchor lights
    N d. sidelights and a stern light

4587: BOTH INTERNATIONAL & INLAND A vessel anchored in fog may warn an approaching vessel by sounding __________.

    N a. the whistle continuously
    Y b. one short, one prolonged, and one short blast of the whistle
    N c. five or more short and rapid blasts of the whistle
    N d. three distinct strokes on the bell before and after sounding the anchor signal

4634: BOTH INTERNATIONAL & INLAND Your tug is underway at night and NOT towing. What light(s) should your vessel show aft to other vessels coming up from astern?

    Y a. One white light
    N b. Two white lights
    N c. One white light and one yellow light
    N d. One white light and two yellow lights

4662: BOTH INTERNATIONAL & INLAND Vessel "A" (towing) and vessel "B" are meeting as shown. In this situation, which statement is TRUE? (DIAGRAM 12 )

    Y a. Both vessels should alter course to starboard and pass port to port.
    N b. Both vessels should alter course to port and pass starboard to starboard.
    N c. Vessel "A" should hold course while vessel "B" alters course to starboard.
    N d. Vessel "A" is the stand-on in this situation.

4670: BOTH INTERNATIONAL & INLAND What determines if a vessel is "restricted in her ability to maneuver"?

    N a. Whether or not all of the vessel's control equipment is in working order
    N b. The vessel's draft in relation to the available depth of water
    Y c. Whether the nature of the vessel's work limits maneuverability required by the Rules
    N d. Whether or not the vessel is the give-way vessel in a meeting situation

4818: BOTH INTERNATIONAL & INLAND A vessel engaged in mineclearance operations shows special identity lights __________.

    N a. instead of the masthead lights
    Y b. which mean that other vessels should not approach within 1000 meters
    N c. that are 225° green lights
    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

4870: BOTH INTERNATIONAL & INLAND When do the Rules require both vessels to change course?

    N a. Any time the danger signal is sounded
    N b. When two power-driven vessels are crossing and it is apparent to the stand-on vessel that the give-way vessel is not taking appropriate action
    Y c. When two power-driven vessels are meeting head-on
    N d. All of the above

8025: INTERNATIONAL ONLY The light which may be used with a vessel's whistle is to be __________.

    N a. used when the whistle is broken
    N b. used prior to sounding the whistle
    N c. used only at night
    Y d. a white light

8059: INTERNATIONAL ONLY You are in sight of a power-driven vessel that sounds two short blasts of the whistle. This signal means that the vessel __________.

    Y a. is altering course to port
    N b. is altering course to starboard
    N c. intends to leave you on her port side
    N d. intends to leave you on her starboard side

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.