Mate of Unlimited Tonnage Practice Test (Great Lakes & Inland)

Watch officer on the Great Lakes freighters and big inland ships of any size. Q312 Great Lakes Topics is only for a Great Lakes route. Coast Guard exam code GLI02.

279 real questions from the Coast Guard National Maritime Center's public sample exams, free. Rules of the Road needs 90%. Every other module needs 70%.

Passing score: Coast Guard pass marks module by module, and the retest rules

What's free: daily rounds, the Brig, the drills and the Pass Meter, for every license. Your first module test is free too. After that, the full Exam Room is $19, once. No subscription.

What's on the test

The Q311 Chart Plot module is done on a paper chart at the exam, so it isn't here. Practice it with the chart and tools.

10 sample questions

1. For the purpose of the Inland Navigation Rules, the term "Inland Waters" includes which of the following?

   • A.The coastline of the United States out to one mile offshore
   • B.The Great Lakes on the United States side of the boundary
   • C.The waters surrounding any islands of the U.S.
   • D.Any lakes within state boundaries
   Show answer

   B. The Great Lakes on the United States side of the boundary

   Q100, Rules of the Road: International & Inland

2. What should you inspect to be sure that it is safe to go aloft in a bosun's chair?

   • A.The tail block
   • B.The gantline
   • C.The chair and bridle
   • D.All of the above
   Show answer

   D. All of the above

   Q160, Deck General

3. What is the difference between net tonnage and gross tonnage?

   • A.Net tonnage is tonnage of cargo compared to tonnage of whole ship.
   • B.There is no difference.
   • C.Net tonnage is the net weight of the ship.
   • D.Net tonnage is the gross tonnage, less certain deductions for machinery and other areas.
   Show answer

   D. Net tonnage is the gross tonnage, less certain deductions for machinery and other areas.

   Q161, Deck Safety

4. Under the IALA Buoyage Systems, which is TRUE of safe water marks?

   • A.They may show a quick-flashing, Q(9)15s, white light
   • B.They must show a composite group-flashing, Fl(2 + 1), green light
   • C.They may show a composite group-flashing, Fl(2 + 1), red light
   • D.They may show a white Morse (A) light
   Show answer

   D. They may show a white Morse (A) light

   Q171, Navigation General: Near Coastal

5. You are steaming in a heavy gale and find it necessary to heave to. Under most circumstances, how is this best accomplished?

   • A.Increasing the speed and taking the sea broad on the bow
   • B.Going slow astern and taking the seas on the quarter
   • C.Stopping the engines and drifting beam to the seas
   • D.Taking the sea fine on the bow and reducing the speed
   Show answer

   D. Taking the sea fine on the bow and reducing the speed

   Q160, Deck General

6. A law enforcement vessel patrolling a marine regatta may exhibit a flashing blue light or which of the following alternates?

   • A.two amber lights in a horizontal line
   • B.a fixed green light over a red flashing light
   • C.a high intensity flashing white light (strobe)
   • D.an alternately flashing red and yellow light
   Show answer

   D. an alternately flashing red and yellow light

   Q100, Rules of the Road: International & Inland

7. In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. Which action should you take?

   • A.Take avoiding action as soon as possible
   • B.Sound five short and rapid blasts at two-minute intervals
   • C.Hold course and speed until the other vessel is sighted
   • D.Stop your engines
   Show answer

   A. Take avoiding action as soon as possible

   Q100, Rules of the Road: International & Inland

8. How should manila lines in which the strands are right-hand laid be coiled?

   • A.Manila line should be coiled in a clockwise direction
   • B.Manila line should be coiled in a counterclockwise direction
   • C.Manila line should never be coiled
   • D.Manila line may be coiled either clockwise or counterclockwise
   Show answer

   A. Manila line should be coiled in a clockwise direction

   Q160, Deck General

9. How can the spread of fire be prevented?

   • A.Cooling surfaces adjacent to the fire
   • B.Shutting off the oxygen supply
   • C.Removing combustibles from the endangered area
   • D.All of the above
   Show answer

   D. All of the above

   Q161, Deck Safety

10. Which would influence a magnetic compass?

    • A.Electrical wiring
    • B.Radio
    • C.Iron pipe
    • D.All of the above
    Show answer

    D. All of the above

    Q171, Navigation General: Near Coastal

What the study guide does

• Short daily rounds of 10 questions, with a streak.
• Practice tests built like the real one, scored with the real pass marks (first one free, then $19 once for the full Exam Room).
• The Brig: questions you miss come back until you get them right twice.
• Pass Meter: your chance of passing every module if you sat it today, worked out from your own answers.
• Lights, shapes and sound signal drills (Rules 21-35).