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?


28: INLAND ONLY A vessel overtaking another in a narrow channel, and wishing to pass on the other vessel's port side, would sound a whistle signal of __________.


43: INLAND ONLY You are meeting another vessel head-on and sound one short blast as a passing signal. The other vessel answers with two short blasts. What should be your next action?


245: INTERNATIONAL ONLY You are on vessel "A" as shown. Vessel "B" sounds two short blasts. You should __________. (DIAGRAM 32 )

    N a. sound two prolonged blasts followed by two short blasts
    N b. sound two short blasts
    Y c. maintain course and speed
    N d. None of the above

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

    N a. white masthead light
    N b. green sidelight
    Y c. red sidelight
    N d. stern light

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

378: INLAND ONLY Two power-driven vessels are crossing within a half a mile of each other as shown. Vessel "A" sounds one short blast on the whistle. This signal means __________. (DIAGRAM 42 )

    N a. "I am altering my course to starboard"
    Y b. "I intend to leave you on my port side"
    N c. "I intend to overtake you on your port side"
    N d. "I am operating astern propulsion"

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

4078: BOTH INTERNATIONAL & INLAND You are making headway in fog and hear a fog signal of two prolonged blasts on your starboard quarter. You should __________.

    N a. stop your vessel
    N b. change course to the left
    N c. change course to the right
    Y d. hold your course and speed

4126: BOTH INTERNATIONAL & INLAND By day, when it is impracticable for a small vessel engaged in diving operations to display the shapes for a vessel engaged in underwater operations, she shall display __________.

    N a. three black balls in a vertical line
    N b. two red balls in a vertical line
    N c. a black cylinder
    Y d. a rigid replica of the International Code flag "A"

4127: BOTH INTERNATIONAL & INLAND A vessel will NOT show sidelights when __________.

    N a. underway but not making way
    N b. making way, not under command
    Y c. not under command, not making way
    N d. trolling underway

4166: BOTH INTERNATIONAL & INLAND A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show __________.

    N a. three masthead lights in a vertical line instead of either the forward or after masthead light
    Y b. two masthead lights in a vertical line instead of either the forward or after masthead lights
    N c. two towing lights in a vertical line at the stern
    N d. a small white light aft of the funnel

4257: BOTH INTERNATIONAL & INLAND Which vessel is required to sound a fog signal of one prolonged followed by two short blasts?

    N a. A vessel not under command
    N b. A sailing vessel, underway
    N c. A vessel restricted in its ability to maneuver, at anchor
    Y d. All of the above

4288: BOTH INTERNATIONAL & INLAND A vessel is carrying three lights in a vertical line. The highest and lowest of these are red and the middle light is white. Which statement is always TRUE?

    N a. During the day, she would display three balls in a vertical line.
    Y b. If making way, she would show masthead lights at night.
    N c. If at anchor, she need not show anchor lights while displaying identifying lights.
    N d. Her fog signal would consist of a rapid ringing of a bell for five seconds every minute.

4336: BOTH INTERNATIONAL & INLAND While underway and in sight of another vessel crossing less than .5 mile away, you put your engines full speed astern. 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.

4415: BOTH INTERNATIONAL & INLAND Which signal may be used by a vessel that is in doubt as to whether sufficient action is being taken by another vessel to avoid collision?

    N a. A continuous sounding of the fog horn
    N b. Firing a gun every minute
    Y c. Five or more short rapid blasts on the whistle
    N d. One prolonged blast on the whistle

4415: BOTH INTERNATIONAL & INLAND Which signal may be used by a vessel that is in doubt as to whether sufficient action is being taken by another vessel to avoid collision?

    N a. A continuous sounding of the fog horn
    N b. Firing a gun every minute
    Y c. Five or more short rapid blasts on the whistle
    N d. One prolonged blast on the whistle

4448: BOTH INTERNATIONAL & INLAND Vessel "A" is underway and pushing ahead when vessel "B" is sighted off the starboard bow as shown. Which statement is TRUE? (DIAGRAM 5 )

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

4459: BOTH INTERNATIONAL & INLAND Three short blasts of the whistle means __________.

    N a. "danger"
    N b. "I am in distress"
    N c. the vessel is not under command (broken down)
    Y d. "I am operating astern propulsion"

4491: BOTH INTERNATIONAL & INLAND Barges being towed at night __________.

    Y a. must be lighted at all times
    N b. must be lighted only if manned
    N c. must be lighted only if towed astern
    N d. need not be lighted

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.

4720: BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown could be a vessel __________. (DIAGRAM 56 )

    N a. towing a barge alongside
    N b. at anchor and dredging
    Y c. underway and engaged in surveying operations
    N d. not under command and making way

4720: BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown could be a vessel __________. (DIAGRAM 56 )

    N a. towing a barge alongside
    N b. at anchor and dredging
    Y c. underway and engaged in surveying operations
    N d. not under command and making way

4720: BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown could be a vessel __________. (DIAGRAM 56 )

    N a. towing a barge alongside
    N b. at anchor and dredging
    Y c. underway and engaged in surveying operations
    N d. not under command and making way

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

4846: BOTH INTERNATIONAL & INLAND In determining "safe speed", the Rules list all of the following as factors which must be taken into account EXCEPT the __________.

    N a. limitations of radar equipment
    N b. presence of background lights at night
    Y c. maximum horsepower of your vessel
    N d. maneuverability of your vessel

4855: BOTH INTERNATIONAL & INLAND Under the Rules, any vessel may slacken her speed, stop, or reverse her engines to __________.

    N a. create a crossing situation
    Y b. allow more time to assess the situation
    N c. attract the attention of another vessel
    N d. All of the above

4857: BOTH INTERNATIONAL & INLAND A vessel approaching a narrow channel shall __________.

    Y a. avoid crossing the channel if it impedes another vessel navigating in the channel
    N b. not overtake any vessels within the channel
    N c. keep as close as possible to the edge of the channel on her port side
    N d. anchor only in the middle of the channel

8092: INTERNATIONAL ONLY A light used to signal passing intentions must be an __________.

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

8092: INTERNATIONAL ONLY A light used to signal passing intentions must be an __________.

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