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?


53: INLAND ONLY You are on vessel "A" and vessel "B" desires to overtake you on the starboard side as shown. After the vessels have exchanged one blast signals you should __________. (DIAGRAM 38 )


88: INLAND ONLY Two power-driven vessels are meeting in the situation as shown. One short blast by vessel "A" means __________. (DIAGRAM 37 )


90: INLAND ONLY Two vessels are in a starboard to starboard meeting situation and will pass well clear approximately 1/4 mile apart. Which action should each vessel take?

    N a. Sound a one blast whistle signal and turn to starboard.
    N b. Maintain course and sound no signal.
    Y c. Sound a two blast whistle signal and maintain course.
    N d. Sound a three blast whistle signal and turn to port.

97: INLAND ONLY Which statement is TRUE concerning a passing agreement made by radiotelephone?

    N a. Such an agreement is prohibited by the Rules.
    N b. A vessel which has made such an agreement must also sound whistle signals.
    N c. Whistle signals must still be exchanged when passing within half a mile of each other.
    Y d. If agreement is reached by radiotelephone, whistle signals are optional.

144: INLAND ONLY A light used to signal passing intentions must be an __________.

    N a. all-round yellow light only
    N b. all-round white light only
    N c. alternating red and yellow light
    Y d. all-round white or yellow light

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

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

194: BOTH INTERNATIONAL & INLAND You are on vessel "A" and proceeding down a narrow channel as shown. You can only navigate within the channel and vessel "B" is crossing so as to involve risk of collision. Which action would be most prudent? (DIAGRAM 40 )

    N a. Back down and allow vessel "B" to cross ahead.
    N b. Alter course to starboard to give him more room.
    N c. Maintain course and speed.
    Y d. Sound the danger signal and take evasive action.

216: INLAND ONLY Signals shall be sounded by a power-driven vessel intending to overtake __________.

    N a. any vessel when within half a mile of that vessel
    Y b. another power-driven vessel when both power-driven vessels are in sight of one another
    N c. any vessel when both are in sight of one another
    N d. another power-driven vessel only when within half a mile of that power-driven vessel

260: INLAND ONLY A vessel engaged in public safety activities may display an alternately flashing red and yellow light. This special light may be used by a vessel engaged in __________.

    Y a. search and rescue
    N b. restricted in ability to maneuver
    N c. not under command
    N d. river bank protection

401: INLAND ONLY Two power-driven vessels are meeting in the situation as shown in a narrow channel on the Great Lakes. Vessel "A" is downbound with a following current. Vessel "B" should __________. (DIAGRAM 37 )

    Y a. take action to permit safe passage
    N b. have the right of way
    N c. initiate the maneuvering signals
    N d. None of the above

4033: BOTH INTERNATIONAL & INLAND The duration of a prolonged blast of the whistle is __________.

    N a. 2 to 4 seconds
    Y b. 4 to 6 seconds
    N c. 6 to 8 seconds
    N d. 8 to 10 seconds

4047: BOTH INTERNATIONAL & INLAND A vessel trawling will display a __________.

    N a. red light over a white light
    Y b. green light over a white light
    N c. yellow light over a red light
    N d. white light over a green light

4125: BOTH INTERNATIONAL & INLAND If you saw flames aboard a vessel but could see the vessel was not on fire, you would know that the __________.

    N a. crew was trying to get warm
    Y b. vessel required immediate assistance
    N c. vessel was attempting to attract the attention of a pilot boat
    N d. vessel was being illuminated for identification by aircraft

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

4148: BOTH INTERNATIONAL & INLAND You are in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must __________.

    N a. stop your engines
    N b. sound two prolonged blasts of the whistle
    N c. sound the danger signal
    Y d. slow to bare steerageway

4325: BOTH INTERNATIONAL & INLAND A vessel aground in fog shall sound, in addition to the proper anchor signal, which of the following?

    N a. Three strokes on the gong before and after sounding the anchor signal
    Y b. Three strokes on the bell before and after the anchor signal
    N c. Four short blasts on the whistle
    N d. One prolonged and one short blast on the whistle

4389: BOTH INTERNATIONAL & INLAND An overtaking situation at night would be one in which one vessel sees which light(s) of a vessel ahead?

    N a. Masthead lights and sidelights
    N b. One sidelight, the masthead lights and stern light
    N c. Both sidelights
    Y d. Stern light

4401: BOTH INTERNATIONAL & INLAND You are underway in heavy fog. You hear the fog signal of a vessel which is somewhere ahead of your vessel. You must __________.

    N a. slow to moderate speed and navigate with caution
    N b. maintain speed and sound the danger signal
    N c. stop engines and navigate with caution
    Y d. slow to bare steerageway and navigate with caution

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

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

4567: BOTH INTERNATIONAL & INLAND As shown, vessel "A", which is pushing ahead, and vessel "B" are crossing. Which is the stand-on vessel? (DIAGRAM 5 )

    N a. Vessel "A" is the stand-on vessel because she is to port of vessel "B".
    N b. Vessel "A" is the stand-on vessel because she is pushing ahead.
    Y c. Vessel "B" is the stand-on vessel because she is to starboard of vessel "A".
    N d. Neither vessel is the stand-on vessel in this situation.

4597: BOTH INTERNATIONAL & INLAND A vessel not under command shall display __________.

    Y a. two red lights at night and two black balls during daylight
    N b. two red lights at night and three black balls during daylight
    N c. three red lights at night and two black balls during daylight
    N d. three red lights at night and three black balls during daylight

4628: BOTH INTERNATIONAL & INLAND A sailing vessel displaying the day-shape shown is indicating that she is __________. (DIAGRAM 35 )

    Y a. being propelled by power as well as sail
    N b. on a starboard tack
    N c. close-hauled and has difficulty maneuvering
    N d. fishing as well as sailing

4716: BOTH INTERNATIONAL & INLAND Which day-shape should a vessel being towed exhibit if the tow EXCEEDS 200 meters?

    N a. A cone, apex downward
    N b. A cone, apex upward
    Y c. A diamond
    N d. A ball

4731: BOTH INTERNATIONAL & INLAND Additional light signals are provided in the Annexes to the Rules for vessels __________.

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

4770: 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
    N c. not sound any whistle signals until the other vessel is sighted
    Y d. sound only fog signals until the other vessel is sighted

4827: BOTH INTERNATIONAL & INLAND The Rules state that vessels may depart from the requirements of the Rules when __________.

    N a. operating in restricted visibility
    N b. operating in a narrow channel
    Y c. necessary to avoid immediate danger
    N d. the Master enters it in the ship's log

8072: INTERNATIONAL ONLY When two vessels are in sight of one another and NOT in or near an area of restricted visibility, any of the following signals may be given EXCEPT __________.

    N a. a light signal of at least five short and rapid flashes
    N b. one prolonged, one short, one prolonged, and one short whistle blasts
    Y c. four short whistle blasts
    N d. two short whistle blasts

8088: INTERNATIONAL ONLY A 20-meter power-driven vessel pushing ahead or towing alongside will display __________.

    N a. two towing lights in a vertical line
    N b. a towing light above the stern light
    N c. two all-round red lights at the masthead
    Y d. two masthead lights in a vertical line