Revise with instant feedback: the moment you pick an answer you see whether it was right, with the explanation where available. Untimed — ideal before you sit a mock exam. Questions you miss keep coming back until you know them.
Exam-day conditions: no feedback until you submit, each module scored separately like the real test, with a full question-by-question review at the end.
The real exam is passed module by module: Rules of the Road requires 90%, most other modules 70%. Chart-plotting modules are taken on paper and not included.
The free sample gives you 20 to 30 questions per module. The full bank contains every available official question, with written explanations on the popular small-vessel credentials, one-off $29, lifetime access on up to 3 devices, all credentials included.
You must pass each module separately. Most modules require 70% to pass.
The exam covers 2 modules: Deck Safety – Stability Problems, Navigation and Deck General – Safety.
This page includes free sample questions drawn from the official USCG sample examinations, with a full bank of around 78 questions across all modules available with lifetime access.
Every question comes from the U.S. Coast Guard National Maritime Center's published sample examinations, which are U.S. government works in the public domain. Wheelhouse Prep is not affiliated with or endorsed by the U.S. Coast Guard.
No. The free practice tests work in your browser with no signup. Your score history is saved on your own device.
A selection of free questions from the official USCG sample examinations. Use the interactive modules above for timed, scored drills.
Each crewmember has an assigned firefighting station. Where is this assignment listed?
Maritime Administration personnel may be allowed in the pilothouse and on the navigation bridge. Who is responsible for these personnel while in these areas of the vessel?
What prevents water running along the shaft of a leaking centrifugal pump from entering the shaft bearing?
Which statement is TRUE concerning a motor lifeboat?
The SS AMERICAN MARINER is ready to bunker with drafts of FWD 14'-04", AFT 17'-06". After all bunkers are on board, soundings indicate the tonnages shown in table ST-0180 below. Use the white pages of The Stability Data Reference Book to determine the free surface correction.
By what means are indications of the master gyrocompass sent to remote repeaters?
A tug should not come alongside a tank vessel in way of its cargo tanks while it is loading grade A, B, or C cargo without the permission of the __________.
Who must approve the vessel's trim and stability booklet?
Why: For U.S. inspected vessels the trim and stability booklet must be approved by the Coast Guard, which reviews the stability data and inclining experiment results during plan approval.
What is a system of reservoirs and connecting tubes in a gyro compass called?
Why: The mercury ballistic is the gyrocompass system of reservoirs connected by tubes. Mercury flowing between them under gravity applies the torque that makes the gyro precess toward and settle on the meridian.
The Officers Competency Certificates Convention of 1936 applies to all of these vessels operating seaward of the boundary line. Which vessel is exempt?
You are docking a vessel. Which statement is TRUE?
What is the displacement of a barge which measures 85' x 46' x 13' and is floating in salt water with a draft of ten feet?
The sailing drafts are: FWD 23'-02", AFT 24'-06" and the GM is 2.8 feet. Use the information in Section 1, the blue pages, of the Stability Data Reference Book to determine the available righting arm at 30° inclination.
At all angles of inclination, which is the true measure of a vessel's stability?
The SS AMERICAN MARINER is loaded with the cargo shown in table ST-0143 below. Use the white pages of The Stability Data Reference Book to determine the amount of liquid loading required in the double bottom tanks to meet a one compartment standard.
Your vessel measures 122 feet long by 18 feet in beam. If the natural rolling period at a draft of 6'-09" is 5 seconds, what is the GM?
Using the information in Section 1, the blue pages, of the Stability Data Reference Book, determine the danger angle for permanent list if the KG is 25.0 feet and the drafts are: FWD 15'-04", AFT 15'-08".
You are loading in a port subject to the winter load line mark and bound for a port subject to the tropical load line mark. You will enter the summer zone after steaming four days, and you will enter the tropical zone after a total of twelve days. You will consume 39 tons of fuel, water, and stores per day. The hydrometer reading at the loading pier is 1.025, and the average TPI is 49. What is the minimum freeboard required at the start of the voyage? Reference Table BL-0010 below.
Your sailing drafts are: FWD 14'-04", AFT 16'-02" and the GM is 3.0 feet. What will be the angle of list if #5 port double bottom (capacity 195 tons, VCG 2.6 feet, and 18.5 feet off the centerline) is filled with saltwater? (Use the data in Section 1, the blue pages, of the Stability Data Reference Book)