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.


57: INLAND ONLY While underway during the day you sight a small motorboat showing a flashing blue light. The blue light indicates a __________.


101: INLAND ONLY You are overtaking another power-driven vessel in a narrow channel. The other vessel will have to move to allow you to pass. You wish to overtake the other vessel on her starboard side. Your first whistle signal should be __________.


124: INLAND ONLY Which term is NOT defined in the Inland Navigation Rules?


125: INLAND ONLY Under the Inland Navigation Rules, the term "Inland Waters" includes __________.

    N a. any waters marked by U.S. aids to navigation
    N b. harbors and rivers to the outermost aids to navigation
    N c. waters along the coast of the United States to a distance of two miles offshore
    Y d. the Western Rivers, extending to the COLREGS demarcation line

152: BOTH INTERNATIONAL & INLAND The vessel showing the day signal is __________. (DIAGRAM 22 )

    N a. A vessel engaged in mine clearance operations
    N b. A fishing vessel with gear extending more than 150 meters horizontally
    N c. A trawler shooting nets in the direction indicated
    Y d. A tug with a tow exceeding 200 meters unable to deviate from course

157: BOTH INTERNATIONAL & INLAND The lights shown are exhibited by a vessel __________. (DIAGRAM 49 )

    N a. restricted in her ability to maneuver
    N b. engaged in fishing
    Y c. not under command
    N d. on pilotage duty

287: BOTH INTERNATIONAL & INLAND The lead vessel shown is a __________. (DIAGRAM 24 )

    N a. dredge
    N b. sailing vessel
    N c. power-driven vessel pushing ahead
    Y d. None of the above

314: INLAND ONLY Identify the operation indicated by the lights shown. (DIAGRAM 85 )

    N a. An aircraft carrier engaged in the launching and recovery of aircraft
    N b. A submarine engaged in underway replenishment at sea
    Y c. A dredge engaged in dredging operations
    N d. A vessel aground assisted by tugs

350: INTERNATIONAL ONLY Two power-driven vessels are crossing within one half mile of each other as shown. Vessel "A" sounds one short blast of the whistle. Vessel "B" should sound __________. (DIAGRAM 42 )

    N a. one prolonged, one short, one prolonged and one short blasts
    N b. one prolonged blast
    N c. two short blasts
    Y d. None of the above

4026: BOTH INTERNATIONAL & INLAND Which is a distress signal?

    N a. Firing of green star shells
    N b. Sounding 5 short blasts on the whistle
    N c. Answering a one blast whistle signal with two blasts
    Y d. A flaming barrel of oil on deck

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

4192: BOTH INTERNATIONAL & INLAND In restricted visibility, a vessel fishing with nets shall sound at intervals of two minutes __________.

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

4206: BOTH INTERNATIONAL & INLAND At night, a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two __________.

    N a. red lights
    N b. red lights and two white lights
    Y c. red lights with a white light in between
    N d. white lights with a red light in between

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

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

4295: BOTH INTERNATIONAL & INLAND The use of the danger signal __________.

    N a. replaces directional signals
    N b. makes the other vessel the stand-on vessel
    Y c. indicates doubt as to another vessels actions
    N d. is the same as a "MAYDAY" signal

4334: BOTH INTERNATIONAL & INLAND In narrow channels, vessels of less than what length shall not impede the safe passage of vessels which can navigate only inside that channel?

    Y a. 20 meters
    N b. 50 meters
    N c. 65 meters
    N d. 100 meters

4336: BOTH INTERNATIONAL & INLAND While underway and in sight of another vessel crossing less than .5 mile away, you put your engines full speed astern. Which statement concerning whistle signals is TRUE?

    Y a. You must sound three short blasts on the whistle.
    N b. You must sound one blast if backing to starboard.
    N c. You must sound whistle signals only if the vessels are meeting.
    N d. You need not sound any whistle signals.

4360: BOTH INTERNATIONAL & INLAND While underway, you see a vessel displaying the day-shapes shown. Which action should you take? (DIAGRAM 6 )

    N a. Maintain course and speed
    N b. Provide assistance, the other vessel is in distress
    Y c. Stay clear, the other vessel is maneuvering with difficulty
    N d. Stop your vessel and sound passing signals

4431: BOTH INTERNATIONAL & INLAND A vessel 50 meters in length at anchor must sound which fog signal?

    Y a. 5-second ringing of a bell every minute
    N b. 5-second ringing of a bell every two minutes
    N c. 5-second sounding of a gong every minute
    N d. 5-second sounding of both a bell and gong every two minutes

4457: BOTH INTERNATIONAL & INLAND If you anchor your 25-meter vessel in a harbor, what light(s) must you show?

    Y a. One all-round white light
    N b. Two all-round white lights
    N c. One all-round red light
    N d. All the deck house lights

4492: BOTH INTERNATIONAL & INLAND You sight another power-driven vessel dead-ahead showing both the red and green sidelights. The required action to take would be to __________.

    N a. carefully watch his compass bearing
    N b. start a radar plot in order to ascertain his course
    N c. alter your course to port
    Y d. alter your course to starboard

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

4545: BOTH INTERNATIONAL & INLAND You are approaching another vessel and are not sure whether danger of collision exists. You must assume __________.

    Y a. there is risk of collision
    N b. you are the give way vessel
    N c. the other vessel is also in doubt
    N d. All of the above are correct.

4625: BOTH INTERNATIONAL & INLAND What must be TRUE in order for a stand-on vessel to take action to avoid collision by her maneuver alone?

    N a. She must be in sight of the give-way vessel.
    N b. There must be risk of collision.
    N c. She must determine that the give-way vessel is not taking appropriate action.
    Y d. All of the above

4842: BOTH INTERNATIONAL & INLAND Which vessel is "underway" according to the Rules?

    N a. A vessel made fast to a single point mooring buoy
    Y b. A vessel engaged in towing, not making way
    N c. A pilot vessel at anchor
    N d. A vessel which has run aground

8031: INTERNATIONAL ONLY Which statement(s) is(are) TRUE concerning light signals?

    N a. The time between flashes shall be about five seconds.
    Y b. The time between successive signals shall be not less than ten seconds.
    N c. The light signals are to be used when not using sound signals.
    N d. All of the above

8040: INTERNATIONAL ONLY Which vessel may NOT exhibit two red lights in a vertical line?

    Y a. A vessel constrained by her draft
    N b. A trawler fishing in close proximity to other trawlers
    N c. A vessel aground
    N d. A dredge

8047: INTERNATIONAL ONLY A vessel sounds one short blast. This signal indicates the vessel __________.

    N a. intends to alter course to starboard
    N b. intends to pass starboard to starboard
    Y c. is altering course to starboard
    N d. intends to pass port to port

8084: INTERNATIONAL ONLY While underway at night, a power-driven vessel of less than 7 meters in length, whose maximum speed which does not exceed 7 knots, may show __________.

    N a. sidelights combined in a single lantern, only
    N b. an all-round flashing yellow light, only
    Y c. one all-round white light, only
    N d. a lantern showing a white light exhibited in sufficient time to prevent collision, only