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.


51: INLAND ONLY Which statement is TRUE concerning the Inland Navigation Rules?


78: INLAND ONLY Under the Inland Navigation Rules, what is the meaning of a one short blast signal used when meeting another vessel?


91: BOTH INTERNATIONAL & INLAND Which of the day-shapes shown would you show on the after end of an inconspicuous partially submerged vessel or object being towed over 200 meters in length? (DIAGRAM 16 )


162: BOTH INTERNATIONAL & INLAND You are on a vessel heading due south and see the lights shown one point on the port bow. This vessel could be heading ___________ . (DIAGRAM 51 )

    N a. SSW
    Y b. NW
    N c. NE
    N d. SE

163: INLAND ONLY A commercial vessel engaged in public safety activities may display a(n) __________.

    N a. flashing yellow light
    N b. flashing blue light
    N c. alternately flashing blue and red light
    Y d. alternately flashing red and yellow light

173: BOTH INTERNATIONAL & INLAND You are on watch and sight a vessel showing only these lights. They indicate a __________. (DIAGRAM 59 )

    N a. submarine on the surface
    Y b. power-driven vessel
    N c. sailing vessel
    N d. vessel engaged in trawling

197: INTERNATIONAL ONLY A partially submerged object towed by a vessel must show during the day one __________.

    Y a. diamond shape when the length of the tow is 200 meters or less
    N b. diamond shape when the length of the tow exceeds 200 meters in length
    N c. black ball
    N d. black ball only when the length of the tow exceeds 200 meters in length

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

    N a. should change course to the right
    N b. should slow down until vessel "A" has passed
    Y c. should hold her course and speed
    N d. may steer various courses and vessel "A" must keep clear

233: BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown. and will pass without changing course. Vessel "B" is an air-cushion vessel operating in the nondisplacement mode. Which light will vessel "A" observe from vessel "B"? (DIAGRAM 17 )

    N a. Green light
    N b. flashing red light
    Y c. flashing yellow light
    N d. flashing white light

336: 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. Vessel "B" should __________. (DIAGRAM 42 )

    N a. maintain course and speed without sounding any signals
    N b. alter course to the right or slowdown
    Y c. sound one short blast and maintain course and speed
    N d. sound the danger signal and slow to moderate speed

395: BOTH INTERNATIONAL & INLAND You see ONLY the light shown. This could be a __________. (DIAGRAM 80 )

    N a. law enforcement vessel
    Y b. sailing vessel
    N c. vessel engaged in trawling
    N d. power-driven vessel

4044: BOTH INTERNATIONAL & INLAND You see a vessel's green sidelight bearing due east from you. The vessel might be heading __________.

    N a. east (090°)
    N b. northeast (045°)
    N c. northwest (315°)
    Y d. southwest (225°)

4075: BOTH INTERNATIONAL & INLAND You are approaching another vessel. She is about one mile distant and is on your starboard bow. You believe she will cross ahead of you. She then 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 to make sure she will have room to pass
    Y c. make a large course change, and slow down if necessary
    N d. wait for another whistle signal from the other vessel

4134: BOTH INTERNATIONAL & INLAND Vessel "A" is overtaking vessel "B" as shown. Which vessel is the stand-on vessel? (DIAGRAM 9 )

    N a. Vessel "A"
    Y b. Vessel "B"
    N c. Neither vessel
    N d. Both vessels must keep clear of the other.

4160: BOTH INTERNATIONAL & INLAND A fog signal of one short, one prolonged, and one short blast may be sounded by a __________.

    Y a. vessel at anchor
    N b. vessel not under command
    N c. vessel towing
    N d. All of the above

4281: BOTH INTERNATIONAL & INLAND A vessel 30 meters in length and aground would display a day-shape consisting of __________.

    N a. a cylinder
    N b. one black ball
    N c. two black balls in a vertical line
    Y d. three black balls in a vertical line

4290: BOTH INTERNATIONAL & INLAND While underway in a fog you hear a signal of three strokes of a bell, a rapid ringing of the bell, and three more strokes of the bell. This signal is made by a vessel __________.

    N a. at anchor and giving warning
    Y b. aground
    N c. at anchor and greater than 100 meters in length
    N d. not under command and at anchor

4297: BOTH INTERNATIONAL & INLAND Which requirement must be met in order for a stand-on vessel to take action to avoid collision?

    Y a. Risk of collision must exist.
    N b. The give-way vessel must have taken action first.
    N c. The vessels must be within half a mile of each other.
    N d. There are no requirements to be met. The stand-on vessel may take action anytime.

4312: BOTH INTERNATIONAL & INLAND A power-driven vessel "not under command" at night must show which lights in a vertical line?

    N a. Three red
    Y b. Two red
    N c. Two white
    N d. Three white

4366: BOTH INTERNATIONAL & INLAND Which vessel is a "vessel restricted in her ability to maneuver" under the Rules?

    Y a. A vessel mineclearing
    N b. A vessel engaged in fishing
    N c. A vessel at anchor
    N d. A vessel not under command

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

4461: BOTH INTERNATIONAL & INLAND During the day, a vessel with a tow over 200 meters in length will show __________.

    N a. a black ball
    Y b. a diamond shape
    N c. two cones, apexes together
    N d. one cone, apex upward

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

4541: BOTH INTERNATIONAL & INLAND The Rules state that vessels may depart from the Rules when __________.

    N a. there are no other vessels around
    N b. operating in a narrow channel
    N c. the Master enters it in the ship's log
    Y d. necessary to avoid immediate danger

4588: BOTH INTERNATIONAL & INLAND While underway in fog, you hear a vessel ahead sound two prolonged blasts on the whistle. You should __________.

    N a. sound two blasts and change course to the left
    N b. sound whistle signals only if you change course
    Y c. sound only fog signals until the other vessel is sighted
    N d. not sound any whistle signals until the other vessel is sighted

4650: BOTH INTERNATIONAL & INLAND Which lights would be shown at night by a vessel which is restricted in her ability to deviate from her course?

    N a. Three red lights in a vertical line
    N b. Three white lights in a vertical line
    N c. Three lights in a vertical line, the highest and lowest white and the middle red
    Y d. Three lights in a vertical line, the highest and lowest red and the middle white

4865: BOTH INTERNATIONAL & INLAND Your 15-meter vessel is crossing a narrow channel and a large cargo vessel to starboard is within the channel and crossing your course. You should __________.

    N a. hold your course and speed
    N b. sound the danger signal
    Y c. keep out of the way of the cargo vessel
    N d. do not cross the channel

8014: INTERNATIONAL ONLY A power-driven vessel leaving a quay or wharf must sound what signal?

    N a. Three short blasts
    N b. A long blast
    N c. A prolonged blast
    Y d. No signal is required.

8057: INTERNATIONAL ONLY Your vessel is backing out of a slip in a harbor and you can see that other vessels are approaching. You should sound __________.

    Y a. three short blasts when leaving the slip
    N b. one prolonged blast followed by three short blasts when the last line is taken aboard
    N c. one prolonged blast only
    N d. the danger signal

8062: INTERNATIONAL ONLY If you sighted three red lights in a vertical line on another vessel at night, it would be a vessel __________.

    N a. aground
    Y b. constrained by her draft
    N c. dredging
    N d. moored over a wreck