Master 500/1600 Ton Practice Test (Oceans)

The same ticket for any ocean. Adds celestial and ocean navigation questions. Coast Guard exam code ONC03.

239 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

Your exam also has Q122 Stability Problems: about 10 load and stability calculations worked from the Coast Guard's Stability Data Reference Book, which the exam room gives you. They aren't drilled here; practice them with that book.

The Q125 Chart Plot and Q127 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. Which action has a tendency to happen to a vessel proceeding along the bank of a river or channel with steep banks?

   • A.The vessel will hug the bank
   • B.The vessel will sheer away from the bank
   • C.The vessel will increase speed
   • D.The vessel will continue in line with the bank
   Show answer

   B. The vessel will sheer away from the bank

   Q160, Deck General

3. If you have to jump in the water when abandoning ship, your legs should be in which position?

   • A.Your legs should be spread apart as far as possible
   • B.Your legs should be in a kneeling position
   • C.Your legs should be held as tightly against your chest as possible
   • D.Your legs should be extended straight down and crossed at the ankles
   Show answer

   D. Your legs should be extended straight down and crossed at the ankles

   Q161, Deck Safety

4. What is the FIRST sign of the existence of a well-developed tropical cyclone?

   • A.Gale force winds from the north
   • B.An unusually long ocean swell
   • C.Steep, short-period waves and light wind
   • D.Thunderstorms and higher than usual humidity
   Show answer

   B. An unusually long ocean swell

   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 statement is TRUE when an anchor is used to assist in turning the vessel in restricted waters?

   • A.Deploying the anchor underfoot shifts the pivot point forward
   • B.Turning on the anchor is to be used only with a single-screw vessel
   • C.Having to use the aid of an anchor is the sign of a novice shiphandler
   • D.This technique should only be used as a last resort
   Show answer

   A. Deploying the anchor underfoot shifts the pivot point forward

   Q160, Deck General

7. If you must swim through an oil fire, which action should be avoided?

   • A.Swim with the wind
   • B.Enter the water feet first
   • C.Wear as much clothing as possible
   • D.Cover eyes with one hand when entering the water
   Show answer

   A. Swim with the wind

   Q161, Deck Safety

8. What does the prefix "nimbo" in a cloud's name mean?

   • A.It signifies middle or high-altitude clouds
   • B.It means rainy clouds
   • C.It means sheet or layer clouds
   • D.It means great vertical development
   Show answer

   B. It means rainy clouds

   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. What is required to be entered into the Official Logbook?

    • A.The annual required stripping and cleaning of the lifeboats
    • B.The biennial weight test of the lifeboats and falls
    • C.The drafts on entering port
    • D.Opening a sideport at sea to renew a gasket
    Show answer

    D. Opening a sideport at sea to renew a gasket

    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).