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.


66: INLAND ONLY A towing vessel pushing ahead on the Western Rivers above the Huey P. Long bridge must show __________.


106: INLAND ONLY You are overtaking another power-driven vessel and sound a whistle signal indicating that you intend to pass the vessel along her starboard side. If the other vessel answers your signal with five short and rapid blasts, you should __________.


193: BOTH INTERNATIONAL & INLAND You are on vessel "B" and crossing a narrow channel. Vessel "A", who can only navigate within the channel, is on your port bow and crossing as shown. Which action should you take? (DIAGRAM 40 )


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.

328: BOTH INTERNATIONAL & INLAND Diagram "D" shows the arc of visibility of a __________. (DIAGRAM 23 )

    N a. white masthead light
    N b. green sidelight
    N c. stern light
    Y d. None of the above

821: INLAND ONLY One and two short blast signals must be sounded on inland waters when __________.

    N a. two sailing vessels are in sight of one another and meeting at a distance of one quarter mile
    N b. two power-driven vessels are in sight of one another and will cross at a distance of one mile
    N c. two power-driven vessels are crossing within half a mile of each other and NOT in sight of each other
    Y d. Two power-driven vessel are in sight of one another and are meeting at a distance of one half mile

4029: INLAND ONLY The masthead light may be located at other than the fore and aft centerline on a power-driven vessel __________.

    N a. less than 20 meters in length
    Y b. less than 12 meters in length
    N c. which has separate sidelights carried on the outboard extremes of the vessel's breadth
    N d. engaged in fishing

4031: BOTH INTERNATIONAL & INLAND Additional light signals are provided in the Annexes to the Rules for vessels __________.

    Y a. engaged in fishing
    N b. not under command
    N c. engaged in towing
    N d. under sail

4080: BOTH INTERNATIONAL & INLAND You are underway, in fog, when you hear a whistle signal of one prolonged blast followed by two short blasts. This signal could indicate a vessel __________.

    Y a. not under command
    N b. being towed
    N c. aground
    N d. All of the above

4100: BOTH INTERNATIONAL & INLAND A 45-meter vessel is pulling a 210-meter tow. She may exhibit __________.

    N a. a masthead light forward, and two masthead lights in a vertical line aft
    Y b. three masthead lights forward and one aft
    N c. two masthead lights forward and no after masthead light
    N d. three masthead lights aft and none forward

4129: BOTH INTERNATIONAL & INLAND Which vessel MUST show two masthead lights in a vertical line?

    Y a. A power-driven vessel less than 50 meters in length with a 20-meter tow
    N b. A sailing vessel towing a small vessel astern
    N c. A vessel not under command
    N d. A vessel engaged in dredging

4191: BOTH INTERNATIONAL & INLAND You are on watch in the fog. Your vessel is proceeding at a safe speed when you hear a fog signal ahead of you. The Rules require you to navigate with caution and, if danger of collision exists, __________.

    N a. slow to less than 2 knots
    N b. stop your engines
    Y c. reduce to bare steerageway
    N d. begin a radar plot

4251: BOTH INTERNATIONAL & INLAND At night, if you see a vessel ahead displaying the lights shown you should __________. (DIAGRAM 70 )

    N a. provide assistance as the vessel is in distress
    N b. stay clear as the vessel is transferring dangerous cargo
    Y c. stay clear as the vessel is fishing
    N d. change course to the right as the vessel is crossing your bow

4265: BOTH INTERNATIONAL & INLAND While underway and pushing a barge ahead, your vessel enters a heavy rain storm. You should sound __________.

    N a. a prolonged blast every two minutes
    N b. two prolonged blasts every two minutes
    Y c. one prolonged and two short blasts every two minutes
    N d. one prolonged and three short blasts every two minutes

4368: BOTH INTERNATIONAL & INLAND In a dense fog you hear a whistle signal ahead of one prolonged blast followed by three short blasts. This signal indicates a __________.

    N a. fishing vessel underway trawling
    Y b. manned vessel being towed
    N c. pilot vessel underway making a special signal
    N d. vessel not under command

4414: BOTH INTERNATIONAL & INLAND Every vessel which is directed by these Rules to keep out of the way of another vessel shall, if the circumstances of the case admit, avoid __________.

    Y a. crossing ahead of the other
    N b. crossing astern of the other
    N c. passing port to port
    N d. passing starboard to starboard

4436: BOTH INTERNATIONAL & INLAND A white masthead light shows through an arc of how many degrees?

    N a. 90°
    N b. 112.5°
    Y c. 225°
    N d. 360°

4451: BOTH INTERNATIONAL & INLAND Every vessel should at all times proceed at a "safe speed". "Safe speed" is defined as that speed where __________.

    N a. you can stop within your visibility range
    Y b. you can take proper and effective action to avoid collision
    N c. you are traveling slower than surrounding vessels
    N d. no wake comes from your vessel

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

4499: BOTH INTERNATIONAL & INLAND At night, the lights shown would indicate a vessel __________. (DIAGRAM 76 )

    Y a. trawling
    N b. laying submarine cable
    N c. towing astern
    N d. dredging

4563: BOTH INTERNATIONAL & INLAND You are on vessel "A" in DIAGRAM 32, and hear vessel "B" sound a signal indicating her intention to overtake you. You feel it is not safe for vessel "B" to overtake you at the present time. You should __________.

    Y a. sound five or more short rapid blasts
    N b. sound two short blasts
    N c. not answer the whistle signal from vessel "B"
    N d. sound three blasts of the whistle

4594: BOTH INTERNATIONAL & INLAND The Rules state that certain factors are to be taken into account when determining safe speed. Those factors include __________.

    Y a. state of wind, sea, and current, and the proximity of navigational hazards
    N b. maximum attainable speed of your vessel
    N c. temperature
    N d. aids to navigation that are available

4627: BOTH INTERNATIONAL & INLAND While underway you sight a vessel displaying the day-shapes shown. You should __________. (DIAGRAM 6 )

    N a. contact the vessel on VHF radiotelephone
    N b. provide assistance, the other vessel is in distress
    Y c. stay clear, the other vessel cannot get out of the way
    N d. stop your vessel and sound passing signals

4643: BOTH INTERNATIONAL & INLAND A sailing vessel underway at night may show __________.

    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

4657: BOTH INTERNATIONAL & INLAND In restricted visibility, a vessel which detects by radar alone the presence of another vessel shall determine if a close quarters situation is developing or risk of collision exists. If so, she shall __________.

    N a. sound the danger signal
    N b. when taking action, make only course changes
    Y c. avoid altering course toward a vessel abaft the beam
    N d. All of the above

4697: BOTH INTERNATIONAL & INLAND A tug is towing three barges astern in restricted visibility. The second vessel of the tow should sound __________.

    N a. one prolonged and two short blasts
    N b. one prolonged and three short blasts
    N c. one short blast
    Y d. no fog signal

4719: BOTH INTERNATIONAL & INLAND The lights shown mean that another vessel should pass no closer than__________________. (DIAGRAM 68 )

    N a. 500 meters
    Y b. 1000 meters
    N c. 1500 meters
    N d. 2000 meters

8006: INTERNATIONAL ONLY The International Rules of the Road apply __________.

    N a. to all waters which are not inland waters
    N b. only to waters outside the territorial waters of the United States
    N c. only to waters where foreign vessels travel
    Y d. upon the high seas and connecting waters navigable by seagoing vessels

8076: INTERNATIONAL ONLY You are underway in a narrow channel, and you are being overtaken by a vessel astern. After the overtaking vessel sounds the proper signal indicating his intention to pass your vessel on your starboard side, you signal your agreement by sounding __________.

    N a. two prolonged followed by two short blasts
    Y b. one prolonged, one short, one prolonged, and one short blast
    N c. one short blast
    N d. two prolonged blasts