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.


49: INLAND ONLY A power-driven vessel, when leaving a dock or berth, is required to sound __________.


93: INLAND ONLY While underway in a harbor you hear a vessel sound a prolonged blast. This signal indicates that this vessel __________.


99: INLAND ONLY A power-driven vessel when pushing ahead or towing alongside on the Western Rivers (above the Huey P. Long Bridge on the Mississippi River) shall exhibit __________.


146: INLAND ONLY What characteristic must a light have if used to signal passing intentions?

    N a. It must be an all-round white light.
    N b. It must be an alternating blue and white light.
    Y c. It must be either an all-round white or an all-round yellow light.
    N d. It must be an alternating red and yellow light.

242: BOTH INTERNATIONAL & INLAND You are on Vessel "A" engaged in fishing as shown in a narrow channel. Vessel "B" is a tanker proceeding in the channel. Vessel "B" sounds five short and rapid blasts. You should __________. (DIAGRAM 37 )

    N a. not answer the whistle signals from vessel "B"
    N b. maintain course and speed
    Y c. not impede the passage of vessel "B"
    N d. sound one prolonged followed by two short blasts

272: BOTH INTERNATIONAL & INLAND Two vessels are meeting as shown in a narrow channel. Vessel "A" is a sailing vessel. Vessel "B" is a power-driven vessel which can safely navigate only within the channel. Vessel "B" sounds the danger signal. Vessel "A" shall __________. (DIAGRAM 37 )

    N a. maintain course and speed
    Y b. not impede the passage of vessel "B"
    N c. sound one prolonged followed by two short blasts
    N d. have the right of way

296: BOTH INTERNATIONAL & INLAND The display of lights shown could represent a __________. (DIAGRAM 48 )

    N a. submarine on the surface
    N b. vessel constrained by her draft
    Y c. tug and a barge being towed astern
    N d. vessel not under command

318: BOTH INTERNATIONAL & INLAND Which dayshape(s) would be displayed by the vessel engaged in the operation indicated by the lights shown. (DIAGRAM 82 )

    Y a. two cones with apexes together
    N b. a ball, a diamond and another ball
    N c. a cylinder
    N d. a diamond

356: 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. This signal means __________. (DIAGRAM 42 )

    N a. "I am intend to leave you on my port side"
    N b. "I intend to intend to overtake you on your port side"
    Y c. "I am altering my course to starboard"
    N d. None of the above

385: INLAND ONLY Which statement is TRUE concerning the fog signal of a canal boat 25 meters in length, anchored in a "special anchorage area" approved by the Secretary?

    Y a. The vessel is not required to sound a fog signal.
    N b. The vessel shall ring a bell for 5 seconds every minute.
    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.

4035: BOTH INTERNATIONAL & INLAND When underway in restricted visibility, you might hear, at intervals of two minutes, any of the following fog signals EXCEPT __________.

    N a. one prolonged blast
    N b. two prolonged blasts
    N c. one prolonged and two short blasts
    Y d. ringing of a bell for five seconds

4138: BOTH INTERNATIONAL & INLAND A vessel may use any sound or light signals to attract the attention of another vessel as long as __________.

    N a. white lights are not used
    N b. red and green lights are not used
    N c. the vessel signals such intentions over the radiotelephone
    Y d. the signal cannot be mistaken for a signal authorized by the Rules

4173: BOTH INTERNATIONAL & INLAND A power-driven vessel underway shall keep out of the way of a vessel __________.

    N a. not under command
    N b. restricted in her ability to maneuver
    N c. engaged in fishing
    Y d. All of the above

4234: BOTH INTERNATIONAL & INLAND What lights, if any, would you exhibit at night if your vessel were broken down and being towed by another vessel?

    N a. None
    N b. Same lights as for a power-driven vessel underway
    N c. A white light forward and a white light aft
    Y d. The colored sidelights and a white stern light

4292: BOTH INTERNATIONAL & INLAND While underway in fog, you hear a signal of one prolonged blast followed by three short blasts. This is the fog signal for a vessel __________.

    N a. towing
    Y b. being towed (manned)
    N c. under sail
    N d. at anchor

4493: BOTH INTERNATIONAL & INLAND You are underway in fog and hear one short, one prolonged, and one short blast in succession. What is the meaning of this signal?

    N a. A vessel is in distress and needs assistance.
    N b. A vessel is fishing, hauling nets.
    Y c. A vessel is at anchor, warning of her position.
    N d. A vessel is towing.

4542: BOTH INTERNATIONAL & INLAND A vessel is towing and carrying the required lights on the masthead. What is the visibility arc of these lights?

    N a. 112.5°
    N b. 135.0°
    Y c. 225.0°
    N d. 360.0°

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.

4590: BOTH INTERNATIONAL & INLAND A vessel being towed, if manned, shall sound a fog signal of __________.

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

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

4665: BOTH INTERNATIONAL & INLAND What is the minimum sound signaling equipment required aboard a vessel 10 meters in length?

    Y a. Any means of making an efficient sound signal
    N b. A bell only
    N c. A whistle only
    N d. A bell and a whistle

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.

4680: BOTH INTERNATIONAL & INLAND Day-shapes must be displayed __________.

    N a. between sunset and sunrise
    N b. only between 8 AM and 4 PM
    Y c. during daylight hours in any visibility
    N d. during daylight hours in unrestricted visibility only

4695: BOTH INTERNATIONAL & INLAND While underway in fog, you hear a vessel ahead sound two short blasts on the whistle. You should __________.

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

5350: BOTH INTERNATIONAL & INLAND A vessel using a traffic separation scheme shall __________.

    Y a. avoid anchoring in areas near the termination of the scheme
    N b. avoid crossing traffic lanes, but if obliged to do so, shall cross on as small an angle as is practical
    N c. only anchor in the separation zone
    N d. use the separation zone for navigating through the scheme if she is hindering other traffic due to her slower speed

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

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

8089: BOTH INTERNATIONAL AND INLAND A towing light __________.

    N a. flashes at regular intervals of 50-70 flashes per minute
    Y b. is yellow in color
    N c. shows an unbroken light over an arc of the horizon of not less than 180° nor more than 225°
    N d. All of the above

8101: INTERNATIONAL ONLY Which statement applies to a vessel "constrained by her draft"?

    N a. The term only applies to vessels in narrow channels.
    Y b. She is severely restricted in her ability to change her course because of her draft in relation to the available depth and width of navigable water.
    N c. She is designated as a "vessel restricted in her ability to maneuver".
    N d. The vessel must be over 100 meters in length.

8115: INTERNATIONAL ONLY Of the vessels listed, which must keep out of the way of all the others?

    N a. A vessel constrained by her draft
    N b. A vessel restricted in her ability to maneuver
    Y c. A vessel pushing a barge
    N d. A vessel engaged in fishing