Mate 500/1600 Ton Practice Test (Oceans)

The mate ticket for any ocean. Coast Guard exam code ONC04.

231 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 Q140 Chart Plot and Q142 Navigation Problems (celestial) 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. If your propeller is racing in rough weather, which action should you take?

   • A.Ignore it, this is acceptable in rough weather
   • B.Decrease your engine speed
   • C.Stop your engine until the rough weather passes
   • D.Increase your engine speed
   Show answer

   B. Decrease your engine speed

   Q160, Deck General

3. The gross weight of a fully charged CO2 cylinder is 80 lbs. When the bottle is empty it weighs 60 lbs. What is the minimum acceptable gross weight of the CO2 bottle before it should be recharged by the manufacturer?

   • A.55 lbs
   • B.68 lbs
   • C.78 lbs
   • D.82 lbs
   Show answer

   C. 78 lbs

   Q161, Deck Safety

4. A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than which duration?

   • A.1.0 second duration
   • B.1.5 seconds duration
   • C.2.0 seconds duration
   • D.3.0 seconds duration
   Show answer

   C. 2.0 seconds duration

   Q171, Navigation General: Near Coastal

5. 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

6. Which term is sometimes used to refer to a disk with a horizontal line through its center, equivalent to the summer load line on a vessel?

   • A.The deadrise mark
   • B.The Plimsoll mark
   • C.The maximum allowable draft mark
   • D.The tonnage mark
   Show answer

   B. The Plimsoll mark

   Q160, Deck General

7. Which term describes the time required to incline the vessel from port to starboard and back to port again?

   • A.Range of stability
   • B.Initial stability
   • C.Inclining moment
   • D.Rolling period
   Show answer

   D. Rolling period

   Q161, Deck Safety

8. Barometer readings in weather reports are given in terms of pressure at which reference location?

   • A.The weather station
   • B.The broadcasting station
   • C.Sea level
   • D.Washington, D.C.
   Show answer

   C. Sea level

   Q171, Navigation General: Near Coastal

9. A commercial vessel engaged in public safety activities may display a(n) identity light(s). Which of the following is appropriate for these activities?

   • A.alternately flashing red and yellow light
   • B.flashing yellow light
   • C.alternately flashing blue and red light
   • D.flashing blue light
   Show answer

   A. alternately flashing red and yellow light

   Q100, Rules of the Road: International & Inland

10. A mariner whose credential has been revoked shall not be issued another credential without which of the following?

    • A.Approval of an administrative law judge
    • B.Approval of the Officer-in-Charge, Marine Inspection
    • C.Taking a new examination
    • D.Approval of the Commandant
    Show answer

    D. Approval of the Commandant

    Q160, Deck General

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).