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.


14: INLAND ONLY You have made your vessel up to a tow and are moving from a pier out into the main channel. Your engines are turning ahead. What whistle signal should you sound?


83: INLAND ONLY If your tug is pushing a barge ahead at night and it is not a composite unit, which light(s) should show aft on your vessel?


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


248: BOTH INTERNATIONAL & INLAND Vessels "I" and "II" are power-driven vessels. You are on vessel "I" as shown. You are the __________. (DIAGRAM 36 )

    N a. give-way vessel
    Y b. stand-on vessel
    N c. overtaking vessel
    N d. None of the above

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

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

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

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

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.

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

4081: BOTH INTERNATIONAL & INLAND You are aboard vessel "A" , a power-driven vessel, on open waters and vessel "B", a sailing vessel, is sighted off your port bow as shown. Which vessel is the stand-on vessel? (DIAGRAM 27 )

    N a. Vessel "A" because it is towing
    N b. Vessel "A" because it is to starboard of vessel "B"
    Y c. Vessel "B" because it is sailing
    N d. Vessel "B" because it is to port of vessel "A"

4082: BOTH INTERNATIONAL & INLAND Which vessel must exhibit three white masthead lights in a vertical line?

    N a. Any vessel towing astern
    Y b. A vessel whose tow exceeds 200 meters astern
    N c. A vessel not under command, at anchor
    N d. A vessel being towed

4105: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning two sailing vessels approaching each other?

    Y a. A sailing vessel overtaking another is the give-way vessel.
    N b. When each is on a different tack, the vessel on the starboard tack shall keep out of the way.
    N c. A sailing vessel seeing another to leeward on an undetermined tack shall hold her course.
    N d. All of the above

4121: BOTH INTERNATIONAL & INLAND A sailing vessel is NOT required to keep out of the way of a __________.

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

4136: BOTH INTERNATIONAL & INLAND The white masthead light required for a power-driven vessel under the Rules is visible over how many degrees of the horizon?

    N a. 022.5°
    N b. 112.5°
    Y c. 225.0°
    N d. 360.0°

4145: BOTH INTERNATIONAL & INLAND You are in charge of a 120-meter power-driven vessel at anchor in fog, sounding the required anchor signals. You hear the fog signal of a vessel underway off your port bow. You may sound __________.

    N a. at least five short and rapid blasts
    N b. two short blasts
    Y c. one short, one prolonged, and one short blast
    N d. three short blasts

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

4165: BOTH INTERNATIONAL & INLAND Which statement is TRUE of a 30-meter sailing vessel underway?

    Y a. She must show sidelights and a stern light in restricted visibility.
    N b. She may show an all-round white light at the top of the mast.
    N c. She need not show a stern light if she is showing all-round lights on the mast.
    N d. If she is using propelling machinery, she shall show forward a shape consisting of two cones, apexes together.

4214: BOTH INTERNATIONAL & INLAND A sailing vessel of over 20 meters in length underway must show a __________.

    N a. red light over a green light at the masthead
    N b. white masthead light
    N c. combined lantern
    Y d. stern light

4217: BOTH INTERNATIONAL & INLAND A man aboard a vessel, signaling by raising and lowering his outstretched arms to each side, is indicating __________.

    N a. danger, stay away
    N b. all is clear, it is safe to pass
    N c. the vessel is anchored
    Y d. a distress signal

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

4255: BOTH INTERNATIONAL & INLAND A stand-on vessel in a crossing situation is allowed to take action when __________.

    N a. on a collision course
    N b. the vessels will pass within one mile
    Y c. it becomes apparent to her that the give-way vessel is not taking appropriate action
    N d. the relative speed of the vessels indicates collision in less than six minutes

4304: BOTH INTERNATIONAL & INLAND A vessel being towed will show __________.

    N a. a forward masthead light
    Y b. sidelights and a stern light
    N c. a towing light
    N d. All of the above

4315: INTERNATIONAL ONLY While underway and in sight of another vessel you put your engines on astern propulsion. Which statement concerning whistle signals is TRUE?

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

4407: BOTH INTERNATIONAL & INLAND A 200-meter vessel is aground in restricted visibility. Which signal is optional?

    N a. A bell signal
    N b. A gong signal
    Y c. A whistle signal
    N d. All of the above

4410: BOTH INTERNATIONAL & INLAND The rules state that vessels may depart from the requirements of 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

4485: BOTH INTERNATIONAL & INLAND You are underway in reduced visibility. You hear the fog signal of another vessel about 20° on your starboard bow. Risk of collision may exist. You should __________.

    N a. alter course to starboard to pass around the other vessel
    Y b. reduce your speed to bare steerageway
    N c. slow your engines and let the other vessel pass ahead of you
    N d. alter course to port to pass the other vessel on its portside

4557: BOTH INTERNATIONAL & INLAND Rule 14 describes the action to be taken by vessels meeting head-on. Which of the following conditions must exist in order for this rule to apply?

    N a. Both vessels must be power-driven.
    N b. They must be meeting on reciprocal or nearly reciprocal courses.
    N c. The situation must involve risk of collision.
    Y d. All of the above

4619: BOTH INTERNATIONAL & INLAND Which vessel is NOT to impede the passage of a vessel which can only navigate safely within a narrow channel?

    N a. Any vessel less than 20 meters in length
    N b. Any sailing vessel
    N c. A vessel engaged in fishing
    Y d. All of the above

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

4850: BOTH INTERNATIONAL & INLAND The Rules state that risk of collision shall be deemed to exist __________.

    N a. whenever two vessels are on opposite courses
    N b. whenever a vessel crosses ahead of the intended track of another vessel
    Y c. if the bearing of an approaching vessel does not appreciably change
    N d. if one vessel approaches another so as to be overtaking

8081: INTERNATIONAL ONLY The light which may be used with a vessel's whistle must be __________.

    N a. used when the whistle is broken
    Y b. a white light
    N c. used only at night
    N d. used prior to sounding the whistle