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.


23: INLAND ONLY Passing signals shall be sounded on inland waters by __________.


107: INLAND ONLY A power-driven vessel intends to overtake another power-driven vessel on the overtaken vessel's port side. What whistle signal should be sounded in order to state this intention?


122: INLAND ONLY A barge more than 50 meters long is required to show how many white anchor lights when anchored in a Secretary approved "special anchorage area"?


205: INTERNATIONAL ONLY Which whistle signal may be sounded by one of two vessels in sight of each other?

    N a. Four short blasts
    N b. One prolonged blast
    Y c. One short blast
    N d. One short, one prolonged, and one short blast

263: INTERNATIONAL ONLY You are on a power-driven vessel "I" as shown. Vessel "II" is a vessel engaged in fishing within 1/2 a mile of your vessel. Which action should you take? (DIAGRAM 36 )

    N a. Hold course and speed without giving a signal.
    Y b. Change course or speed to avoid vessel "II".
    N c. Sound one short blast, and await a response.
    N d. Sound two short blasts, and await a response.

4021: BOTH INTERNATIONAL & INLAND A light signal of three flashes means __________.

    N a. "I am in doubt as to your actions"
    N b. "My engines are full speed astern"
    N c. "I desire to overtake you"
    Y d. "I am operating astern propulsion"

4026: BOTH INTERNATIONAL & INLAND Which is a distress signal?

    N a. Firing of green star shells
    N b. Sounding 5 short blasts on the whistle
    N c. Answering a one blast whistle signal with two blasts
    Y d. A flaming barrel of oil on deck

4049: BOTH INTERNATIONAL & INLAND Your vessel is NOT making 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.

4058: BOTH INTERNATIONAL & INLAND Which factor is listed in the Rules as one which must be taken into account when determining safe speed?

    N a. The construction of the vessel
    Y b. The maneuverability of the vessel
    N c. The experience of vessel personnel
    N d. All of the above must be taken into account.

4073: 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. manned being towed
    N c. unmanned being towed
    N d. at anchor

4109: BOTH INTERNATIONAL & INLAND A vessel towing in fog shall sound a fog signal of __________.

    N a. one prolonged blast every one minute
    N b. two prolonged blasts every two minutes
    Y c. one prolonged and two short blasts every two minutes
    N d. one prolonged blast every two minutes

4133: BOTH INTERNATIONAL & INLAND Which statement is TRUE when you are towing more than one barge astern at night?

    N a. Only the last barge in the tow must be lighted.
    N b. Only the first and last barges in the tow must be lighted.
    Y c. All barges in the tow must be lighted.
    N d. All barges, except unmanned barges, must be lighted.

4157: BOTH INTERNATIONAL & INLAND Which vessel may exhibit identifying lights when not actually engaged in her occupation?

    N a. A trawler
    N b. A fishing vessel
    N c. A tug
    Y d. None of the above

4244: BOTH INTERNATIONAL & INLAND A 200-meter vessel restricted in her ability to maneuver, at anchor, will sound a fog signal of __________.

    N a. a 5 second ringing of a bell forward and a 5 second sounding of a gong aft at intervals of 1 minute
    Y b. one prolonged followed by two short blasts every 2 minutes
    N c. one prolonged followed by three short blasts every minute
    N d. one prolonged followed by three short blasts every 2 minutes

4263: BOTH INTERNATIONAL & INLAND In a dense fog, you hear a whistle signal of one prolonged blast followed by three short blasts. This signal is sounded by a __________.

    Y a. manned vessel being towed
    N b. fishing vessel underway trawling
    N c. pilot vessel underway making a special signal
    N d. vessel not under command

4265: BOTH INTERNATIONAL & INLAND While underway and pushing a barge ahead, your vessel enters a heavy rain storm. You should sound __________.

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

4322: BOTH INTERNATIONAL & INLAND In which situation do you think a risk of collision exists?

    N a. A vessel is 22° on your port bow, range increasing, bearing changing slightly to the right.
    N b. A vessel is broad on your starboard beam, range decreasing, bearing changing rapidly to the right.
    N c. A vessel is 22° abaft your port beam, range increasing, bearing is constant.
    Y d. A vessel is on your starboard quarter, range decreasing, bearing is constant.

4505: BOTH INTERNATIONAL & INLAND Vessels of less than what length may not impede the passage of other vessels which can safely navigate only within a narrow channel or fairway?

    N a. 10 meters
    Y b. 20 meters
    N c. 30 meters
    N d. 40 meters

4548: BOTH INTERNATIONAL & INLAND Which statement is TRUE regarding equipment for sound signals?

    N a. A vessel of less than 12 meters in length need not have any sound signaling equipment.
    N b. Any vessel over 12 meters in length must be provided with a gong.
    Y c. Manual sounding of the bell and gong must always be possible.
    N d. Automatic sounding of the signals is not permitted.

4572: BOTH INTERNATIONAL & INLAND You are underway in low visibility and sounding fog signals. What changes would you make in the fog signal immediately upon losing propulsion?

    N a. Begin sounding two prolonged blasts at two-minute intervals.
    N b. Begin sounding one prolonged blast followed by three short blasts at two-minute intervals.
    Y c. Begin sounding one prolonged blast followed by two short blasts at two-minute intervals.
    N d. No change should be made in the fog signal.

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

4636: BOTH INTERNATIONAL & INLAND A vessel sailing shall keep out of the way of all of the following vessels except a vessel __________.

    N a. not under command
    Y b. engaged on pilotage duty
    N c. restricted in her ability to maneuver
    N d. engaged in fishing

4669: BOTH INTERNATIONAL & INLAND Which statement is TRUE concerning the light used with whistle signals?

    N a. Use of such a light is required.
    Y b. Its purpose is to supplement short blasts of the whistle.
    N c. The light shall have the same characteristics as a masthead light.
    N d. All of the above

4699: BOTH INTERNATIONAL & INLAND What is the identity signal which may be sounded by a vessel engaged on pilotage duty in fog?

    N a. 2 short blasts
    N b. 3 short blasts
    Y c. 4 short blasts
    N d. 5 short blasts

4860: BOTH INTERNATIONAL & INLAND A vessel engaged in mineclearance operations shows special identity lights __________.

    Y a. in addition to the lights required for a power-driven vessel
    N b. which means that other vessels should not approach closer than 500 meters on either side of the vessel
    N c. that are green and show through an arc of the horizon of 225°
    N d. All of the above

4872: BOTH INTERNATIONAL & INLAND If you are the stand-on vessel in a crossing situation, you may take action to avoid collision by your maneuver alone. When may this action be taken?

    N a. As soon as you determine that risk of collision exists
    N b. Only when you have reached extremis
    Y c. When it becomes apparent to you that the give-way vessel is not taking appropriate action
    N d. When you determine that your present course will cross ahead of the other vessel

8004: INTERNATIONAL ONLY When moving from a berth alongside a quay (wharf), a vessel must sound __________.

    N a. three short blasts
    N b. a long blast
    N c. a prolonged blast
    Y d. No signal is required.

8048: INTERNATIONAL ONLY You are underway in a narrow channel, and you are being overtaken by a vessel astern. After the overtaking vessel sounds the proper signal indicating his intention to pass your vessel on your starboard side, you signal your agreement by sounding __________.

    N a. one short blast
    N b. two prolonged blasts
    N c. two prolonged followed by two short blasts
    Y d. one prolonged, one short, one prolonged, and one short blast in that order

8067: INTERNATIONAL ONLY Which vessel shall avoid impeding the safe passage of a vessel constrained by her draft?

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

8111: INTERNATIONAL ONLY Your vessel is backing out of a slip in a harbor. Visibility is restricted. You should sound __________.

    Y a. one prolonged blast only
    N b. one prolonged blast followed by three short blasts when the last line is taken aboard
    N c. one prolonged blast followed by three short blasts when leaving the slip
    N d. the danger signal