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.


11: INLAND ONLY When you are overtaking another vessel and desire to pass on her left or port hand, you should sound __________.


45: INLAND ONLY You are overtaking another power-driven vessel in a narrow channel, and you wish to overtake on the other vessel's port side. You will sound a whistle signal of __________.


55: INLAND ONLY The lights shown are those of a __________. (DIAGRAM 75 )


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"

258: INLAND ONLY Vessels "A" and "B" are meeting on a river as shown and will pass 1/4 mile apart. Which statement is TRUE? (DIAGRAM 41 )

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

4038: BOTH INTERNATIONAL & INLAND A bell is used to sound a fog signal for a __________.

    N a. power-driven vessel underway
    Y b. sailing vessel at anchor
    N c. vessel engaged in fishing
    N d. vessel not under command

4111: BOTH INTERNATIONAL & INLAND A 50-meter vessel is towing astern and the length of the tow is 100 meters. In addition to sidelights, which lights may she show to fully comply with the Rules?

    N a. Two masthead lights forward, a stern light, and a towing light above the stern light
    Y b. A masthead light forward, two masthead lights aft, a stern light, and a towing light above the stern light
    N c. No masthead light forward, two masthead lights aft, a stern light, and a towing light above the stern light
    N d. Three masthead lights forward, one masthead light aft, and two towing lights in a vertical line at the stern

4141: BOTH INTERNATIONAL & INLAND While underway and towing, your vessel enters fog. Which fog signal should you sound?

    N a. One prolonged blast
    N b. Two prolonged blasts
    Y c. One prolonged blast and two short blasts
    N d. Three distinct blasts

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

4187: BOTH INTERNATIONAL & INLAND In a crossing situation on open waters, a sailing vessel shall keep out of the way of all the following vessels EXCEPT a __________.

    N a. vessel not under command
    N b. vessel restricted in her ability to maneuver
    Y c. power-driven vessel approaching on her starboard side
    N d. vessel fishing

4232: BOTH INTERNATIONAL & INLAND The use of the signal consisting of five or more short blasts on the ship's whistle __________.

    N a. replaces directional signals
    N b. makes the other vessel the give-way vessel
    Y c. indicates doubt as to the other vessel's action
    N d. makes it necessary to slow or stop

4280: BOTH INTERNATIONAL & INLAND Vessels I and II are underway as shown. Vessel I is a sailing vessel with the wind dead aft. Vessel II is a power-driven vessel trawling. Which statement is TRUE? (DIAGRAM 33 )

    Y a. Vessel I is to keep clear because the other vessel is fishing.
    N b. Vessel II is to keep clear because she is a power-driven vessel.
    N c. Vessel II is to keep clear because the other vessel is to its starboard.
    N d. Both vessels are to take action to stay clear of each other.

4359: BOTH INTERNATIONAL & INLAND Your vessel is underway but stopped and making no way through the water when fog sets in. Which fog signal should you sound?

    N a. One prolonged blast on the whistle
    N b. One prolonged blast and two short blasts on the whistle
    Y c. Two prolonged blasts on the whistle
    N d. One short, one prolonged, and one short blast on the whistle

4406: BOTH INTERNATIONAL & INLAND Two power-driven vessels are crossing as shown. Vessel "A" sounds three short blasts on the whistle. This signal means that vessel "A" __________. (DIAGRAM 42 )

    N a. intends to hold course and speed
    N b. is sounding the danger signal
    Y c. is backing engines
    N d. proposes to cross ahead of the other vessel

4408: BOTH INTERNATIONAL & INLAND A fishing vessel displaying the lights shown is __________. (DIAGRAM 67 )

    N a. anchored
    N b. underway but not fishing
    N c. tending a small fishing boat
    Y d. fishing by trawling

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

4455: BOTH INTERNATIONAL & INLAND Which vessel is "underway" within the meaning of the Rules?

    N a. A vessel at anchor with the engine turning
    N b. A vessel tied to an offshore mooring buoy
    N c. A vessel aground with the engine turning
    Y d. A vessel drifting with the engine stopped

4501: BOTH INTERNATIONAL & INLAND For identification purposes at night, U.S. Navy submarines on the surface may display an intermittent flashing light of which color?

    Y a. Amber (yellow)
    N b. White
    N c. Blue
    N d. Red

4516: BOTH INTERNATIONAL & INLAND Which vessel is, by definition, unable to keep out of the way of another vessel?

    N a. Vessel engaged in fishing
    Y b. Vessel restricted in her ability to maneuver
    N c. Sailing vessel
    N d. Vessel towing

4549: BOTH INTERNATIONAL & INLAND Two sailing vessels are approaching each other as shown. Which statement is correct? (DIAGRAM 3 )

    N a. Vessel "I" should stand on because she has the wind on her port side.
    Y b. Vessel "II" should stand on because she has the wind on her starboard side.
    N c. Neither vessel is the stand-on vessel because they are meeting head-on.
    N d. Vessel "I" should stand on because she is close-hauled.

4564: BOTH INTERNATIONAL & INLAND Which vessel sounds the same fog signal when underway or at anchor?

    N a. A sailing vessel
    Y b. A vessel restricted in her ability to maneuver
    N c. A vessel constrained by her draft
    N d. A vessel not under command

4667: BOTH INTERNATIONAL & INLAND While underway and in sight of another vessel, less than one half mile away, you put your engines on astern propulsion. Which statement concerning whistle signals is TRUE?

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

4687: BOTH INTERNATIONAL & INLAND A vessel engaged in fishing while at anchor shall sound a fog signal of __________.

    N a. one prolonged and three short blasts at one minute intervals
    N b. a rapid ringing of the bell for five seconds at one minute intervals
    Y c. one prolonged and two short blasts at two minute intervals
    N d. a sounding of the bell and gong at one minute intervals

4700: BOTH INTERNATIONAL & INLAND What does the word "length" refer to?

    N a. Length between the perpendiculars
    Y b. Length overall
    N c. Waterline length
    N d. Registered length

4705: BOTH INTERNATIONAL & INLAND In complying with the Rules, of what must the mariner take due regard?

    N a. Limited backing power of his vessel
    N b. Radar information about nearby vessels
    N c. The occupation of the other vessel, if known
    Y d. All of the above

4721: BOTH INTERNATIONAL & INLAND Which vessel when anchored at night, would not be required to show anchor lights?

    Y a. A vessel engaged in underwater operations
    N b. A vessel engaged in mine clearance
    N c. A vessel engaged on pilotage duty
    N d. A vessel engaged in survey operations

4722: BOTH INTERNATIONAL & INLAND Which vessel, when anchored at night, is not required to show anchor lights?

    N a. A power-driven vessel
    N b. A vessel engaged in survey operations
    N c. A vessel engaged on pilotage duty
    Y d. A vessel engaged in fishing

4868: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning two sailing vessels approaching each other?

    N a. The vessel making the most speed is the give-way vessel.
    Y b. A sailing vessel overtaking another is the give-way vessel.
    N c. A sailing vessel seeing another to leeward on an undetermined tack shall hold her course.
    N d. All of the above

8009: INTERNATIONAL ONLY You are underway on the high seas in restricted visibility. You hear a fog signal of one prolonged and two short blasts. It could be any of the following EXCEPT a vessel __________.

    N a. minesweeping
    N b. engaged in fishing
    N c. constrained by her draft
    Y d. being towed

8038: INTERNATIONAL ONLY In which case would an overtaking vessel sound a whistle signal of two prolonged followed by one short blast?

    N a. When overtaking in restricted visibility
    Y b. When overtaking in a narrow channel
    N c. When overtaking on open waters
    N d. When no other vessels are in the immediate area