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.


7: INLAND ONLY When power-driven vessels are crossing, a signal of one short blast by either vessel means __________.


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


189: BOTH INTERNATIONAL & INLAND You are on vessel "A" towing a barge alongside and meeting vessel "B" as shown. Which action should you take? (DIAGRAM 39 )


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.

215: INTERNATIONAL ONLY At night you sight the lights shown. What do the lights indicate? (DIAGRAM 66 )

    N a. Two vessels pair trawling
    Y b. A tug with a tow alongside
    N c. A ship being assisted by a tug
    N d. A vessel engaged in fishing

244: BOTH INTERNATIONAL & INLAND You are on a 15-meter vessel "A" in a narrow channel as shown. Vessel "B", a large tanker which can safely navigate only within the channel, sounds five short and rapid blasts. You should __________. (DIAGRAM 32 )

    N a. sound one prolonged followed by two short blasts
    N b. not answer the whistle signal from vessel "B"
    N c. maintain course and speed
    Y d. not impede the passage of vessel "B"

250: 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. You sound one short blast on the whistle. Vessel "II" does not sound any signal. Which action should you take? (DIAGRAM 36 )

    N a. Hold course and speed without giving a signal.
    Y b. Sound the danger signal and reduce speed.
    N c. Sound one short blast, reduce speed and turn to starboard.
    N d. Sound two short blasts and change course to port.

4032: BOTH INTERNATIONAL & INLAND Which vessel may combine her sidelights and stern light in one lantern on the fore and aft centerline of the vessel?

    Y a. A 16-meter sailing vessel
    N b. A 25-meter power-driven vessel
    N c. A 28-meter sailing vessel
    N d. Any non-self-propelled vessel

4087: BOTH INTERNATIONAL & INLAND A "flashing light", by the definition given in the rules, is a light that __________.

    N a. is red in color
    N b. is visible over an arc of the horizon of 360
    Y c. flashes at regular intervals at a frequency of 120 flashes or more per minute
    N d. All of the above

4130: BOTH INTERNATIONAL & INLAND The duration of each blast of the whistle signals used in meeting and crossing situations is __________.

    Y a. about 1 second
    N b. 2 or 4 seconds
    N c. 4 to 6 seconds
    N d. 8 to 10 seconds

4182: BOTH INTERNATIONAL & INLAND Distress signals may be __________.

    N a. red flares
    N b. smoke signals
    N c. sound signals
    Y d. Any of the above

4205: BOTH INTERNATIONAL & INLAND A towing vessel is towing two barges astern. The length of the tow from the stern of the tug to the stern of the last barge is 250 meters. The towing vessel is 45 meters in length. How many white masthead lights should be displayed on the tugboat at night?

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

4231: BOTH INTERNATIONAL & INLAND A 15-meter sailing vessel would be required to show __________.

    N a. sidelights, stern light, and a red light over a green light on the mast
    Y b. sidelights, and stern light, but they may be in a combined lantern on the mast
    N c. separate sidelights and stern light
    N d. sidelights only

4247: BOTH INTERNATIONAL & INLAND What day-shape is to be shown by a vessel aground?

    N a. A cylinder
    N b. Two cones with their apexes together
    N c. Two black balls in a vertical line
    Y d. Three black balls in a vertical line

4303: BOTH INTERNATIONAL & INLAND In fog, you hear apparently forward of your beam a fog signal of 2 prolonged blasts in succession every two minutes. This signal indicates a __________.

    N a. power-driven vessel making way through the water
    N b. vessel being pushed ahead
    N c. vessel restricted in her ability to maneuver
    Y d. power-driven vessel underway but stopped and making no way through the water

4316: BOTH INTERNATIONAL & INLAND When shall the stand-on vessel in a crossing situation take action to avoid the other vessel?

    N a. When a risk of collision exists
    Y b. When action by the give-way vessel alone will not prevent a collision
    N c. When the bearing to give-way vessel becomes steady
    N d. When the vessels become less than 1/2 mile apart

4383: BOTH INTERNATIONAL & INLAND You are in charge of a stand-on vessel in a crossing situation. The other vessel is 1.5 miles to port. You believe that risk of collision exists. You should __________.

    N a. take avoiding action immediately upon determining that risk of collision exists
    N b. immediately sound the danger signal
    Y c. take avoiding action only after providing the give-way vessel time to take action, and determining that her action is not appropriate
    N d. hold course and speed until the point of extremis, and then sound the danger signal, taking whatever action will best avert collision

4396: BOTH INTERNATIONAL & INLAND Concerning the identification signal for a pilot vessel, in fog, which statement is TRUE?

    Y a. When at anchor, the pilot vessel is only required to sound anchor signals.
    N b. The identification signal must be sounded any time the pilot vessel is underway.
    N c. The pilot vessel may only sound the identity signal when making way.
    N d. All of the above

4428: BOTH INTERNATIONAL & INLAND Which signal shall a power-driven vessel sound when making way in fog?

    N a. One short blast every two minutes
    Y b. One prolonged blast every two minutes
    N c. One prolonged and two short blasts every two minutes
    N d. Three short blasts every two minutes

4441: BOTH INTERNATIONAL & INLAND At night, power-driven vessels less than 12 meters in length may, instead of the underway lights for vessels under 50 meters, show which lights?

    N a. Sidelights and stern light
    Y b. One all-round white light and sidelights
    N c. Masthead light only
    N d. Stern light only

4449: BOTH INTERNATIONAL & INLAND In a crossing situation, which vessel may sound the danger signal?

    N a. Give-way vessel
    N b. Stand-on vessel
    Y c. Either vessel
    N d. Neither vessel

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

4520: BOTH INTERNATIONAL & INLAND When anchoring a 20-meter vessel at night, you must show __________.

    Y a. one all-round white light
    N b. two all-round white lights
    N c. one all-round white light and the stern light
    N d. one all-round white light and a flare up light

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

4671: BOTH INTERNATIONAL & INLAND Which statement is true concerning the light used to accompany whistle signals?

    Y a. It is only used to supplement short blasts of the whistle.
    N b. It is mandatory to use such a light.
    N c. The light shall have the same characteristics as a masthead light.
    N d. All of the above

4674: BOTH INTERNATIONAL & INLAND You are on watch in fog. Which vessel is "in sight"?

    Y a. A vessel that you can see from the bridge
    N b. A radar target of which you have determined the course and speed
    N c. A vessel from which you can hear the fog signal
    N d. All of the above

4723: BOTH INTERNATIONAL & INLAND You see a vessel displaying ONLY the lights shown. This could be a __________. (DIAGRAM 45 )

    N a. vessel engaged in fishing at anchor
    N b. pilot vessel on pilotage duty
    N c. vessel engaged in launching or recovering aircraft
    Y d. power-driven vessel underway

8072: INTERNATIONAL ONLY When two vessels are in sight of one another and NOT in or near an area of restricted visibility, any of the following signals may be given EXCEPT __________.

    N a. a light signal of at least five short and rapid flashes
    N b. one prolonged, one short, one prolonged, and one short whistle blasts
    Y c. four short whistle blasts
    N d. two short whistle blasts

8081: INTERNATIONAL ONLY The light which may be used with a vessel's whistle must be __________.

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

8135: INTERNATIONAL ONLY What characteristic must a light used to indicate passing intentions have?

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