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.


12: INLAND ONLY Your vessel is meeting another vessel head-on. To comply with the steering and sailing rules, you should __________.


31: INLAND ONLY At night, a light signal consisting of two flashes by a vessel indicates __________.


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 )


94: INLAND ONLY You are overtaking another power-driven vessel and sound a whistle signal indicating that you intend to pass the vessel along her starboard side. If the other vessel answers your signal with five short and rapid blasts, you should __________.

    Y a. not overtake the other vessel until both vessels exchange the same passing signal
    N b. not overtake the other vessel until she sounds another five short and rapid blast signal
    N c. pass the other vessel along her starboard side
    N d. sound five short and rapid blasts and pass along her starboard side

112: INLAND ONLY While underway, you sight the lights shown, with the yellow lights flashing. You should __________. (DIAGRAM 81 )

    N a. wait until the vessel ahead crosses your bow
    N b. stop until the red lights turn green
    Y c. pass between the two sets of vertical red lights
    N d. proceed, leaving all the lights on your starboard side

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

    N a. All-round yellow lights placed at the corners of each barge in the group
    N b. Two yellow lights in a vertical line at the corner extremities of the group
    Y c. Two unobstructed all-round white lights
    N d. Two unobstructed all-round red lights

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

    N a. All-round yellow lights placed at the corners of each barge in the group
    N b. Two yellow lights in a vertical line at the corner extremities of the group
    Y c. Two unobstructed all-round white lights
    N d. Two unobstructed all-round red lights

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

132: INLAND ONLY Which statement is TRUE of a power-driven vessel proceeding downbound with the current, when meeting an upbound vessel on the Western Rivers?

    N a. She shall not impede the upbound vessel.
    N b. She shall pass on the port side of the other.
    Y c. She shall propose the manner of passage.
    N d. All of the above

177: BOTH INTERNATIONAL & INLAND You see the display of lights shown. This could indicate a __________. (DIAGRAM 64 )

    N a. dredge working at anchor
    N b. dredge restricted in its ability to maneuver
    N c. 55-meter tug towing astern, length of tow exceeds 200 meters
    Y d. 65-meter tug towing astern, length of tow 150 meters

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

379: BOTH INTERNATIONAL & INLAND A seagoing tug has a tow greater than 200 meters as shown and is severely restricted in her ability to deviate from her course. Which lights would be displayed from the towing vessel? (DIAGRAM 24 )

    Y a. Three white masthead lights, red-white-red all-round lights, sidelights, stern light and a towing light
    N b. Three white masthead lights, red-white-red all-round lights, sidelights and two towing lights
    N c. Three white masthead lights, two all-round red lights, sidelights, stern light and a towing light
    N d. None of the above

4155: BOTH INTERNATIONAL & INLAND A vessel towing is showing three forward white masthead lights in a vertical line. This means that the length of the __________.

    N a. towing vessel is less than 50 meters
    N b. towing vessel is greater than 50 meters
    N c. tow is less than 200 meters
    Y d. tow is greater than 200 meters

4179: BOTH INTERNATIONAL & INLAND A sailing vessel is NOT allowed to show the all-round red over green lights on the mast if __________.

    N a. she is showing sidelights
    N b. her sidelights are combined and shown on the fore and aft centerline of the vessel
    N c. she is showing a stern light
    Y d. her sidelights and stern light are combined in one lantern and shown on the mast

4217: BOTH INTERNATIONAL & INLAND A man aboard a vessel, signaling by raising and lowering his outstretched arms to each side, is indicating __________.

    N a. danger, stay away
    N b. all is clear, it is safe to pass
    N c. the vessel is anchored
    Y d. a distress signal

4267: BOTH INTERNATIONAL & INLAND You are overtaking a vessel at night and you see a yellow light showing above the stern light of the overtaken vessel. The overtaken vessel is __________.

    N a. underway and dredging
    N b. pushing ahead or towing alongside
    Y c. towing astern
    N d. a pilot vessel

4325: BOTH INTERNATIONAL & INLAND A vessel aground in fog shall sound, in addition to the proper anchor signal, which of the following?

    N a. Three strokes on the gong before and after sounding the anchor signal
    Y b. Three strokes on the bell before and after the anchor signal
    N c. Four short blasts on the whistle
    N d. One prolonged and one short blast on the whistle

4425: BOTH INTERNATIONAL & INLAND A power-driven vessel exhibits the same lights as a __________.

    N a. vessel towing, when not underway
    N b. vessel towing astern
    N c. sailing vessel
    Y d. pushing vessel and a vessel being pushed, when they are in a composite unit

4529: BOTH INTERNATIONAL & INLAND A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights __________.

    Y a. do not interfere with the keeping of a proper look-out
    N b. are not the color of either sidelight
    N c. have a lesser range than the prescribed lights
    N d. All of the above

4536: BOTH INTERNATIONAL & INLAND If a sailing vessel with the wind on the port side sees a sailing vessel to windward and cannot tell whether the other vessel has the wind on the port or starboard side, she shall __________.

    N a. hold course and speed
    N b. sound the danger signal
    Y c. keep out of the way of the other vessel
    N d. turn to port and come into the wind

4573: BOTH INTERNATIONAL & INLAND A power-driven vessel shows the same lights as a __________.

    N a. vessel engaged in towing, when not underway
    N b. vessel towing astern
    N c. sailing vessel
    Y d. pushing vessel and a vessel being pushed, when they are rigidly connected in a composite unit

4658: BOTH INTERNATIONAL & INLAND A 60-meter vessel which is trawling is required to show how many white masthead lights at night?

    Y a. 1
    N b. 2
    N c. 3
    N d. 4

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

4696: BOTH INTERNATIONAL & INLAND You are underway in fog when you hear the rapid ringing of a bell for five seconds followed by the sounding of a gong for five seconds. This signal indicates a vessel __________.

    N a. engaged in pair trawling
    N b. fishing while making no way through the water
    Y c. more than 100 meters in length, at anchor
    N d. engaged on pilotage duty

4696: BOTH INTERNATIONAL & INLAND You are underway in fog when you hear the rapid ringing of a bell for five seconds followed by the sounding of a gong for five seconds. This signal indicates a vessel __________.

    N a. engaged in pair trawling
    N b. fishing while making no way through the water
    Y c. more than 100 meters in length, at anchor
    N d. engaged on pilotage duty

4828: BOTH INTERNATIONAL & INLAND The Rules state that vessels may depart from the Rules when __________.

    N a. there are other vessels in the vicinity
    N b. operating in a traffic separation scheme
    N c. engaged in a situation involving more than two vessels
    Y d. necessary to avoid immediate danger

4853: BOTH INTERNATIONAL & INLAND You are approaching another vessel on crossing courses. She is about one mile distant and is on your starboard bow. You believe she will cross ahead of you but she sounds a whistle signal of five short blasts. You should __________.

    N a. answer the signal and hold course and speed
    N b. reduce speed slightly
    N c. initiate a passing signal that will allow for a half mile clearance
    Y d. make a large course change, and slow down if necessary

8005: INTERNATIONAL ONLY You are in charge of a 250-meter freight vessel constrained by her draft proceeding down a narrow channel. There is a vessel engaged in fishing on your starboard bow half a mile away. According to Rule 9, which statement is TRUE?

    N a. You are not to impede the fishing vessel.
    Y b. If you are in doubt as to the fishing vessel's intentions you may sound at least five short and rapid blasts on the whistle.
    N c. You are to slow to bare steerageway until clear of the fishing vessel.
    N d. You must sound one prolonged blast to alert the fishing vessel.

8019: INTERNATIONAL ONLY If a vessel displays three all-round red lights in a vertical line at night, during the day she may show __________.

    N a. three balls in a vertical line
    Y b. a cylinder
    N c. two diamonds in a vertical line
    N d. two cones, apexes together

8075: INTERNATIONAL ONLY You intend to overtake a vessel in a narrow channel, and you intend to pass along the vessel's port side. How should you signal your intention?

    N a. Two short blasts followed by two prolonged blasts
    Y b. Two prolonged followed by two short blasts
    N c. Two prolonged blasts only
    N d. Two short blasts only