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.


57: INLAND ONLY While underway during the day you sight a small motorboat showing a flashing blue light. The blue light indicates a __________.


74: INLAND ONLY Which term is NOT used in the Inland Navigation Rules?


104: INLAND ONLY Which light(s) shall be shown at night on a moored barge which reduces the navigable width of any channel to less than 80 meters?


148: INLAND ONLY In a narrow channel, you are underway on vessel "A" and desire to overtake vessel "B". After you sound two short blasts on your whistle, vessel "B" sounds five short and rapid blasts on the whistle. You should __________.

    N a. pass with caution on the port side of vessel "B"
    N b. wait for the other vessel to initiate a signal
    Y c. initiate another signal after the situation has stabilized
    N d. immediately answer with the danger signal, and then sound one short blast

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

173: BOTH INTERNATIONAL & INLAND You are on watch and sight a vessel showing only these lights. They indicate a __________. (DIAGRAM 59 )

    N a. submarine on the surface
    Y b. power-driven vessel
    N c. sailing vessel
    N d. vessel engaged in trawling

383: INLAND ONLY You are meeting "head on" a tug towing a barge alongside about a mile away. In addition to the white masthead lights which other lights do you see on the tug and tow combined?

    N a. One green and one red sidelight on the outside of the unit
    N b. One green and one red sidelight and a special flashing light
    N c. Only the green and red sidelights marking each vessel
    Y d. The green and red sidelights marking each vessel and a special flashing light

4005: BOTH INTERNATIONAL & INLAND Which signal is recognized as a distress signal?

    N a. Directing the beam of a searchlight at another vessel
    Y b. A smoke signal giving off orange colored smoke
    N c. A whistle signal of one prolonged and three short blasts
    N d. International Code Signal "PAN" spoken over the radiotelephone

4053: BOTH INTERNATIONAL & INLAND Two vessels meeting in a "head-on" situation are directed by the Rules to __________.

    Y a. alter course to starboard and pass port to port
    N b. alter course to port and pass starboard to starboard
    N c. decide on which side the passage will occur by matching whistle signals
    N d. slow to bare steerageway

4102: BOTH INTERNATIONAL & INLAND A distress signal __________.

    N a. consists of 5 or more short blasts of the fog signal apparatus
    Y b. may be used separately or with other distress signals
    N c. consists of the raising and lowering of a large white flag
    N d. is used to indicate doubt about another vessel's intentions

4271: BOTH INTERNATIONAL & INLAND A tug is towing three manned barges in line in fog. The third vessel of the tow should sound __________.

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

4295: BOTH INTERNATIONAL & INLAND The use of the danger signal __________.

    N a. replaces directional signals
    N b. makes the other vessel the stand-on vessel
    Y c. indicates doubt as to another vessels actions
    N d. is the same as a "MAYDAY" signal

4319: BOTH INTERNATIONAL & INLAND Which statement about a 25-meter auxiliary sailboat is TRUE?

    N a. The sidelights and stern light may be combined in one lantern.
    N b. When operating under sail, her fog signal would consist of one prolonged blast.
    N c. She may show a green light over a red light at the masthead.
    Y d. She must show fixed sidelights.

4339: BOTH INTERNATIONAL & INLAND Two vessels are in an overtaking situation. Which of the lights on the overtaken vessel will the overtaking vessel see?

    N a. Two masthead lights
    N b. One masthead light and a sidelight
    N c. Both sidelights
    Y d. Stern light only

4353: BOTH INTERNATIONAL & INLAND Every vessel that is to keep out of the way of another vessel must take positive early action to comply with this obligation and must __________.

    Y a. avoid crossing ahead of the other vessel
    N b. avoid passing astern of the other vessel
    N c. sound one prolonged blast to indicate compliance
    N d. alter course to port for a vessel on her port side

4354: BOTH INTERNATIONAL & INLAND At night, a power-driven vessel less than 12 meters in length may, instead of the normal navigation lights, show sidelights and one __________.

    Y a. white light
    N b. yellow light
    N c. flashing white light
    N d. flashing yellow light

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

4475: BOTH INTERNATIONAL & INLAND A self-propelled dredge not engaged in dredging but proceeding to a dredging location at night would __________.

    N a. not be required to show any lights
    N b. be required to show the lights characteristic of a dredge
    N c. be required to show the lights of a stationary dredge
    Y d. be required to show the lights of a power-driven vessel underway

4500: BOTH INTERNATIONAL & INLAND Your power-driven vessel is stopped and making no way, but is not in any way disabled. Another vessel is approaching you on your starboard beam. Which statement is TRUE?

    N a. The other vessel must give way since your vessel is stopped.
    Y b. Your vessel is the give-way vessel in a crossing situation.
    N c. You should be showing the lights or shapes for a vessel not under command.
    N d. You should be showing the lights or shapes for a vessel restricted in her ability to maneuver.

4583: BOTH INTERNATIONAL & INLAND An anchor ball need NOT be exhibited by an anchored vessel if she is __________.

    N a. under 50 meters in length, and anchored in an anchorage
    N b. over 150 meters in length
    N c. rigged for sail
    Y d. less than 7 meters in length, and not in or near an area where other vessels normally navigate

4652: BOTH INTERNATIONAL & INLAND A vessel displaying the day-shapes shown is __________. (DIAGRAM 18 )

    N a. towing astern with a tow greater than 200 meters in length
    N b. not under command
    Y c. dredging
    N d. carrying dangerous cargo

4725: BOTH INTERNATIONAL & INLAND What is the minimum sound signaling equipment required aboard a vessel 24 meters in length?

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

4734: 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
    Y c. the signal cannot be mistaken for a signal authorized by the Rules
    N d. the vessel signals such intentions over the radiotelephone

4856: BOTH INTERNATIONAL & INLAND When in sight of another vessel and there is sufficient sea room, any action taken to avoid collision must __________.

    N a. be accompanied by sound signals
    Y b. not result in another close quarters situation
    N c. include a speed change
    N d. All of the above

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

6500: BOTH INTERNATIONAL & INLAND A towing vessel and her tow are severely restricted in their ability to change course. When making way, the towing vessel will show ONLY __________.

    N a. the masthead lights for a towing vessel
    N b. the lights for a vessel restricted in her ability to maneuver
    N c. sidelights, stern light, and towing light
    Y d. All of the above.

8019: INTERNATIONAL ONLY If a vessel displays three all-round red lights in a vertical line at night, during the day she may show __________.

    N a. three balls in a vertical line
    Y b. a cylinder
    N c. two diamonds in a vertical line
    N d. two cones, apexes together

8044: INTERNATIONAL ONLY In international waters, you are on Vessel "I" in the situation as shown. Vessel "II" sounds one short blast. Which action should you take? (DIAGRAM 36 )

    N a. Sound one short blast and hold course and speed.
    Y b. Hold course and speed
    N c. Sound one short blast and slow down or turn to starboard.
    N d. Sound two short blasts, slow down and turn to port

8058: INTERNATIONAL ONLY Which vessel is to keep out of the way of the others?

    N a. A vessel constrained by her draft
    N b. A vessel engaged in underwater operations
    Y c. A vessel engaged in trawling
    N d. A vessel not under command

8118: INTERNATIONAL ONLY A signal of intent must be sounded in international waters by __________.

    N a. a vessel meeting another head-on
    Y b. a vessel overtaking another in a narrow channel
    N c. a vessel crossing the course of another
    N d. the give-way vessel in a crossing situation