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.


5: INLAND ONLY You are overtaking a power-driven vessel in a narrow channel and wish to leave her on your starboard side. You may __________.


86: INLAND ONLY What is the whistle signal used to indicate a power-driven vessel leaving a dock?


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?


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

    N a. vessel towing astern
    Y b. sailing vessel
    N c. submarine operating on the surface
    N d. vessel pushing a barge ahead

218: INLAND ONLY Your tug is pushing a barge ahead at night. What light(s) should show aft on your vessel? DIAGRAMS60,75,46,70

    N a. The light(s) in Diagram 60.
    Y b. The light(s) in Diagram 75.
    N c. The light(s) in Diagram 46.
    N d. The light(s) in Diagram 70.

225: INLAND ONLY A barge more than 50 meters long, at anchor in a "special anchorage area designated by the Secretary", is required to show how many white anchor lights?

    N a. One
    N b. None
    N c. One, on the near approach of another vessel
    Y d. Two

230: BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown. Vessel "B" is the __________. (DIAGRAM 17 )

    Y a. stand-on vessel
    N b. give-way vessel
    N c. burdened vessel
    N d. None of the above

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

249: 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. Which action should you take? (DIAGRAM 36 )

    N a. Hold course and speed without giving a signal.
    N b. Sound the danger signal and reduce speed.
    N c. Sound one short blast, reduce speed and turn to starboard.
    Y d. Sound one short blast and await response from the fishing vessel.

257: INLAND ONLY Two power-driven vessels are meeting in the situation as shown. One short blast from either vessel means __________. (DIAGRAM 37 )

    N a. "I am altering my course to starboard."
    Y b. "I intend to leave you on my port side."
    N c. "I intend to hold course and speed."
    N d. "I intend to pass on your starboard side."

359: BOTH INTERNATIONAL & INLAND Two power-driven vessels are crossing as shown. Vessel "A" sounds one short blast on the whistle. You are on vessel "B" and doubt that sufficient action is being taken by vessel "A" to avoid collision. You should __________. (DIAGRAM 42 )

    N a. maintain course and speed
    N b. alter course to the left and increase speed
    N c. sound one short blast and maintain course and speed
    Y d. None of the above

378: 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 am altering my course to starboard"
    Y b. "I intend to leave you on my port side"
    N c. "I intend to overtake you on your port side"
    N d. "I am operating astern propulsion"

4040: BOTH INTERNATIONAL & INLAND Which of the day-shapes shown indicates a vessel with a tow exceeding 200 meters in length? (DIAGRAM 16 )

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

4045: BOTH INTERNATIONAL & INLAND A vessel shall be deemed to be overtaking when she can see at night __________.

    Y a. only the stern light of the vessel
    N b. a sidelight and one masthead light of the vessel
    N c. only a sidelight of the vessel
    N d. any lights except the masthead lights of the vessel

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

4158: BOTH INTERNATIONAL & INLAND A 25-meter vessel trawling will show the dayshape(s) consisting of __________.

    N a. a basket
    N b. two balls
    Y c. two cones, apexes together
    N d. a cone, apex downward

4220: BOTH INTERNATIONAL & INLAND A vessel towed astern shall show __________.

    N a. masthead lights
    Y b. sidelights
    N c. a special flashing light
    N d. All of the above

4348: BOTH INTERNATIONAL & INLAND You are on vessel "A" pushing a barge ahead and meeting vessel "B" as shown. How should the vessels pass? (DIAGRAM 12 )

    Y a. Both vessels must alter course to starboard and pass port to port.
    N b. Both vessels must alter course to port and pass starboard to starboard.
    N c. Vessel "A" should maintain course and vessel "B" alter course.
    N d. The vessels should determine which will alter course by sounding whistle signals.

4420: BOTH INTERNATIONAL & INLAND A vessel transferring provisions or cargo at sea shall display during the day __________.

    N a. two black balls in a vertical line
    N b. three black balls in a vertical line
    N c. three shapes in a vertical line; the highest and lowest shall be red balls and the middle a white diamond
    Y d. three black shapes in a vertical line; the highest and lowest shall be balls and the middle one a diamond

4458: BOTH INTERNATIONAL & INLAND You see the lights shown as illustrated on your port bow. You should __________. (DIAGRAM 50 )

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

4504: BOTH INTERNATIONAL & INLAND While underway in a narrow channel, a vessel should stay __________.

    N a. in the middle of the channel
    Y b. to the starboard side of the channel
    N c. to the port side of the channel
    N d. to the side of the channel that has the widest bends

4508: BOTH INTERNATIONAL & INLAND Which vessel may carry her sidelights and stern light in a combined lantern on the mast?

    Y a. An 18-meter sailing vessel
    N b. A 10-meter sailing vessel also being propelled by machinery
    N c. A 25-meter sailing vessel
    N d. All of the above

4550: BOTH INTERNATIONAL & INLAND Which statement concerning an overtaking situation is correct?

    N a. The overtaking vessel is the stand-on vessel.
    N b. Neither vessel is the stand-on vessel.
    N c. The overtaking vessel must maintain course and speed.
    Y d. The overtaking vessel must keep out of the way of the other.

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

4630: BOTH INTERNATIONAL & INLAND You hear the fog signal of another vessel forward of your beam. Risk of collision may exist. You MUST __________.

    Y a. reduce speed to bare steerageway
    N b. stop your engines
    N c. begin a radar plot
    N d. All of the above

4655: BOTH INTERNATIONAL & INLAND Which vessels shall turn off their sidelights?

    N a. All vessels that are not under command
    Y b. All fishing vessels that are not making way
    N c. All sailing vessels which are becalmed
    N d. All vessels engaged in underwater operations

4711: BOTH INTERNATIONAL & INLAND Which vessel would exhibit sidelights when underway and not making way?

    N a. A vessel trawling
    N b. A vessel not under command
    Y c. A pilot vessel
    N d. A vessel engaged in dredging

4862: BOTH INTERNATIONAL & INLAND You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?

    Y a. Your speed must be reduced to bare steerageway.
    N b. A look-out is not required if the radar is on.
    N c. Fog signals are only required when a vessel is detected by radar.
    N d. The radar should always be kept on a short-range scale.

5100: BOTH INTERNATIONAL & INLAND Lighting requirements in inland waters are different from those for international waters for __________.

    N a. barges being towed astern
    N b. vessels not under command
    Y c. vessels pushing ahead
    N d. All of the above

8027: INTERNATIONAL ONLY Two prolonged blasts followed by one short blast on the whistle is a signal which could be sounded by a __________.

    N a. fishing vessel
    N b. vessel anchored
    N c. mineclearing vessel
    Y d. vessel overtaking another in a narrow channel