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.


2: INLAND ONLY What is the required whistle signal for a power-driven vessel leaving a dock or berth?


43: INLAND ONLY You are meeting another vessel head-on and sound one short blast as a passing signal. The other vessel answers with two short blasts. What should be your next action?


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 __________.


123: INLAND ONLY What is not contained in the Inland Navigation Rules?

    N a. An inconspicuous, partly submerged object
    N b. Lights on pipelines
    Y c. A vessel constrained by her draft
    N d. An air-cushion vessel

133: INLAND ONLY A power-driven vessel operating in a narrow channel with a following current on the Great Lakes or Western Rivers is meeting an upbound vessel. Which statement is TRUE?

    Y a. The downbound vessel has the right of way.
    N b. The upbound vessel must initiate the required maneuvering signals.
    N c. The upbound vessel must propose the manner of passing.
    N d. All of the above

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

    Y a. 40-meter tug with tow exceeding 200 meters
    N b. tug unable to maneuver as required by the Rules
    N c. range marking a channel beneath a drawbridge
    N d. 60-meter tug pushing a barge ahead

238: BOTH INTERNATIONAL & INLAND Vessels "A" and "B" are meeting in a narrow channel as shown but are not in sight of one another due to restricted visibility. Which statement is TRUE concerning whistle signals between the vessels? (DIAGRAM 29 )

    N a. Both vessels should sound two short blasts.
    N b. Both vessels should sound one short blast.
    N c. Vessel "A" should sound one short blast and vessel "B" should sound two short blasts.
    Y d. None of the above statements is TRUE.

255: INTERNATIONAL ONLY Vessels "A" and "B" are meeting on a river as shown and will pass 1/4 mile apart. Which light on vessel "B" will you see if you are on vessel "A"? (DIAGRAM 41 )

    N a. special flashing yellow light
    N b. flashing blue light
    N c. two yellow towing lights
    Y d. None of the above

259: BOTH INTERNATIONAL & INLAND Barges being towed at night must exhibit navigation lights __________.

    Y a. at all times
    N b. only if manned
    N c. only if towed astern
    N d. Need not be lighted

386: INLAND ONLY Which statement is TRUE concerning the fog signal of a barge 35 meters in length, anchored in a "special anchorage area" approved by the Secretary?

    N a. The vessel shall ring a bell for 5 seconds every minute.
    Y b. The vessel is not required to sound a fog signal.
    N c. The vessel shall sound one blast of the whistle every 2 minutes.
    N d. The vessel shall sound three blasts on the whistle every 2 minutes.

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

    Y a. under oars
    N b. on pilotage duty
    N c. engaged in fishing
    N d. towing

4011: BOTH INTERNATIONAL & INLAND A pilot vessel on pilotage duty at night will show sidelights and a stern light __________.

    N a. when at anchor
    N b. only when making way
    Y c. at any time when underway
    N d. only when the identifying lights are not being shown

4022: BOTH INTERNATIONAL & INLAND A sailing vessel underway may exhibit __________.

    Y a. a red light over a green light at the masthead
    N b. a green light over a red light at the masthead
    N c. two white lights in a vertical line at the stern
    N d. an all-round white light at the bow

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.

4174: BOTH INTERNATIONAL & INLAND A vessel sounding a fog signal of one short, one prolonged, and one short blast is indicating that the vessel is __________.

    N a. fishing
    N b. in distress
    Y c. at anchor
    N d. not under command

4180: BOTH INTERNATIONAL & INLAND A power-driven vessel, when towing astern, shall show __________.

    N a. two towing lights in a vertical line
    Y b. a towing light in a vertical line above the stern light
    N c. two towing lights in addition to the stern light
    N d. a small white light in lieu of the stern light

4260: BOTH INTERNATIONAL & INLAND The minimum length of a power-driven vessel that must show forward and after masthead lights is __________.

    N a. 30 meters
    Y b. 50 meters
    N c. 75 meters
    N d. 100 meters

4328: BOTH INTERNATIONAL & INLAND A vessel displaying the day-shape shown __________. (DIAGRAM 10 )

    N a. is at anchor
    N b. is not under command
    Y c. has a tow that exceeds 200 meters in length
    N d. has a tow that is carrying dangerous cargo

4382: BOTH INTERNATIONAL & INLAND While underway in fog, you hear a vessel sound four short blasts in succession. What does this signal indicate?

    Y a. A pilot vessel
    N b. A vessel being towed
    N c. A vessel fishing
    N d. A sailboat

4417: BOTH INTERNATIONAL & INLAND What describes a head-on situation?

    N a. Seeing a vessel displaying both sidelights ONLY dead ahead
    N b. Seeing two forward white towing identification lights in a vertical line on a towing vessel directly ahead
    N c. Seeing both sidelights of a vessel directly off your starboard beam
    Y d. Seeing both sidelights and masthead light(s) of a vessel dead ahead

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

4439: BOTH INTERNATIONAL & INLAND Signals required for vessels aground include __________.

    N a. by night, the anchor lights for a vessel of her length, and three red lights in a vertical line
    N b. a short, a prolonged, and a short blast
    Y c. by day, three black balls in a vertical line
    N d. All of the above

4460: BOTH INTERNATIONAL & INLAND Of the vessels listed, which must keep out of the way of all the others?

    Y a. A sailing vessel
    N b. A vessel restricted in her ability to maneuver
    N c. A vessel not under command
    N d. A vessel engaged in fishing

4479: BOTH INTERNATIONAL & INLAND What signal indicates doubt that sufficient action is being taken by another vessel to avoid collision?

    Y a. Five short and rapid blasts of the whistle
    N b. Three long blasts of the whistle
    N c. Three short and rapid blasts of the whistle
    N d. One prolonged blast followed by three short blasts of the whistle

4486: BOTH INTERNATIONAL & INLAND What day-shape would a vessel at anchor show during daylight?

    Y a. One black ball
    N b. Two black balls
    N c. Three black balls
    N d. No signal

4558: BOTH INTERNATIONAL & INLAND The stern light shall be positioned such that it will show from dead astern to how many degrees on each side of the stern of the vessel?

    N a. 22.5°
    Y b. 67.5°
    N c. 112.5°
    N d. 135.0°

4626: BOTH INTERNATIONAL & INLAND A vessel being towed astern, where the length of the tow exceeds 200 meters, will exhibit __________.

    N a. two balls in a vertical line
    Y b. a diamond shape where it can best be seen
    N c. a ball on each end of the tow
    N d. no day-shape

4683: BOTH INTERNATIONAL & INLAND The stern light shall be positioned such that it will show from dead astern to how many degrees on each side of the stern of the vessel?

    N a. 135.0°
    N b. 112.5°
    Y c. 67.5°
    N d. 22.5°

5150: BOTH INTERNATIONAL & INLAND There are two classes of vessels which do not have to comply with the rule regarding traffic separation schemes, to the extent necessary to carry out their work. One of those is a vessel __________.

    N a. engaged in fishing
    N b. towing another
    Y c. servicing a navigational aid
    N d. on pilotage duty

8027: INTERNATIONAL ONLY Two prolonged blasts followed by one short blast on the whistle is a signal which could be sounded by a __________.

    N a. fishing vessel
    N b. vessel anchored
    N c. mineclearing vessel
    Y d. vessel overtaking another in a narrow channel