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36 original national-core questions. Unofficial learning practice; no state certificate, reciprocity or proof of boat-handling skill.

Source edition: USCG November 2023 guide and current safety guidance; NASBLA 100-2022 Core scope reference. Verified 11 September 2026. Curated coverage; use current charts, weather, local authorities and approved courses for your trip.

Optional. Leave blank for the standard repeatable round; use the same seed and setup to repeat its order.

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This score covers only the questions answered. It is not a boating certificate, a state-law review or evidence of practical ability. Use an approved course and current local guidance before operating.

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Missed answer review

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Topic performance

Which safety topics need another look? Correct and missed counts describe only this round; untested topics are not evidence of ability.

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Answer ledger

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An unexpected fall overboard can leave too little time to retrieve and fasten a life jacket. Wearing a suitable, correctly fitted jacket provides buoyancy before that emergency starts. On a warm day, the water may still be cold enough to disrupt breathing and movement. Flotation helps someone stay afloat, while clothing chosen for immersion helps protect against cold. One does not replace the other.

Preparation also determines whether someone ashore knows when to raise an alarm. A float plan records the intended route, return time and information needed if the party becomes overdue. It belongs with a reliable shore contact, who needs updates when plans change and confirmation when everyone returns safely. A short canoe outing deserves this preparation just as a motorboat trip does. Information kept only with people aboard leaves nobody ashore responsible for acting on it.

The boat, passengers and route introduce different risks, even on a familiar outing.

  • Loading and equipment. Capacity includes weight as well as the number of people. Gear counts too. Low, balanced, secured loads help prevent instability, and safety equipment needs to be serviceable and accessible rather than simply present aboard.
  • Alcohol and judgment. A sober operator is essential, but passengers also need to avoid impairment. Alcohol can reduce balance and judgment, so a sober person at the helm does not prevent an impaired passenger from falling overboard.
  • Weather and the return trip. Wind, waves and changing conditions must fit the craft and the operator's ability. Thunderstorms are a reason to postpone a small-boat outing. Once afloat, nearby storms warrant an early return to port or safe shelter while a safe route remains.

Traffic creates another set of decisions. Port means left and starboard means right when facing the bow. A give-way vessel has a duty to keep clear; a stand-on vessel normally maintains course and speed so the encounter is predictable. These terms do not excuse either vessel from preventing a collision. The type of vessel, visibility and whether boats are meeting, crossing or overtaking determine which rule applies.

Federal equipment requirements are minimums, not a guarantee that a particular trip is safe. State education and operator rules, local restrictions and the boat manufacturer's instructions also matter. Knowing a rule can prevent a mistaken choice, but answering knowledge questions does not demonstrate docking, boat handling or rescue skills. Boating safety practice is educational, not legal advice or a substitute for approved instruction and on-water training.

How to Use This Tool:

Choose a broad practice round or concentrate on one safety topic. The bank contains 36 original text questions, with six each in Trip planning, Safety equipment, Navigation, Safe operation, Weather & water, and Emergencies.

  1. Choose the Safety topic, Vessel context and Difficulty. The default includes all topics and vessel contexts at mixed difficulty. Motorboat and paddlecraft choices both retain shared-core questions; Foundations and Applied scenarios narrow the question pool rather than change the scoring.
  2. Select Feedback. After each answer, the default, shows the correction and explanation immediately. At the end records and locks each choice but withholds correctness and explanations until the round is finished.
  3. Select a Question count offered for your filters. The unfiltered mixed round defaults to 12 and offers 1, 3, 6, 12, 18 or 36 questions. Smaller pools can offer only one or two. Recheck the count after changing filters because an unavailable count is replaced by that pool's default. If a count warning appears, choose one of the available values.
  4. Enter an optional Replay seed under Advanced, then select Start practice. A blank seed uses the standard repeatable round, not a new random draw. A custom seed can contain up to 128 characters; spaces at the beginning and end are removed. A seed that exceeds the limit triggers a notice and falls back to the standard round.
  5. Select one of the four answers after reading the whole situation. The choice locks immediately, so there is no separate submit step or opportunity to revise it within that attempt. Use Next question to continue, then View results after the final answer to see the corrections and Answer ledger. Every selected question must be answered before a final result is available.

Interpreting Results:

During a round, Practice status and the progress bar describe how many questions you have answered. At the end, the main fraction changes to correct answers out of the round's question count. Reaching 100% progress therefore does not mean every answer was correct. Perfect round means no mistakes on that attempt, not an official pass or proof of boating competence.

Topic performance compares counts of Correct and Missed answers, not percentages of a complete boating curriculum. A short round may sample topics unevenly or omit some entirely. Untested topics are not rated, and the study suggestion favors the topic with the most misses rather than estimating overall ability. The Missed answer review and Answer ledger show the selected answer, correct answer, explanation and source information needed to examine each mistake.

Retry missed appears only after a completed round with mistakes and starts a new attempt containing those wrong answers. Its denominator is the number retried, not the original round size. Replay same seed repeats the questions and option order. Try a new seed changes the draw but may repeat questions; selecting the entire eligible pool necessarily reuses every question. Change setup clears the current attempt.

For a meaningful comparison, keep the topic, vessel context, difficulty, count and feedback mode consistent, and distinguish a first attempt from a replay after reading corrections. An improved replay score can show that the explanations were remembered without establishing how well that knowledge transfers to a different situation.

Technical Details:

Collision-avoidance duties depend on vessel type, visibility and the encounter. A rule for two powerboats crossing in sight is not a universal instruction for fog, narrow channels or every other vessel. The following selected duties explain the navigation scenarios.

Lookout and collision avoidance

Rule Situation Duty
5 Lookout, in all visibility conditions. Use sight, hearing and all appropriate available means. A clear chartplotter display does not remove this duty.
6 Choosing a safe speed. Allow effective collision avoidance and stopping for present visibility, traffic, maneuverability and other conditions.
13 Overtaking another vessel in sight. Keep clear until finally past and clear, not merely until alongside.
14 Ordinary powerboats meeting head-on with collision risk. Both alter to starboard for a port-to-port pass.
15 and 16 Ordinary powerboats crossing with collision risk; the other is on your starboard. Give way early and substantially. Avoid crossing ahead when circumstances permit.
17 The stand-on vessel's changing responsibility. Initially maintain course and speed. You may act when give-way action is inadequate and must act when that vessel alone cannot avoid collision.

The head-on and crossing entries assume vessels in sight in open water without special circumstances. Additional rules and Inland exceptions can change the applicable duties. A powerboat taking early avoiding action as the stand-on vessel in a crossing with another powerboat should, when circumstances permit, not turn to port for a vessel on its own port side.

Equipment suitability and serviceability

Approval, fit, condition and age answer different questions. Passing one check does not cancel a failure on another.

Equipment Condition to check Consequence
Life jacket Approval label, wearer limits, activity and secure fit. A child's jacket that rises over the chin needs the correct size and adjustment, not a larger adult substitute.
Inflatable personal flotation device (PFD) Wearer and activity restrictions, inflation readiness and maintenance instructions. Do not assume an inflatable suits every paddler or activity.
Disposable marine extinguisher pressure The indicator must be in its operable range. Replace an unserviceable disposable extinguisher before relying on it as required equipment.
Dated disposable marine extinguisher age More than 12 years since manufacture. Remove it from service. A normal pressure indication does not override age or the manufacturer's removal instructions.

The federal recreational-vessel fire-protection rules effective April 20, 2022 also require approved, accessible equipment that is unexpired, serviceable and without signs of previous use. The locking pin, nozzle and visible damage or corrosion matter alongside pressure. Required extinguisher types and quantities depend on the vessel; these selected questions are not a complete equipment-compliance check.

An engine cut-off switch (ECOS) stops propulsion when the operator is displaced from the helm. Its link belongs on the operator, their clothing or their PFD, not just on the steering wheel. Under the federal use requirement effective April 1, 2021, a covered recreational vessel is less than 26 feet overall and capable of at least 115 pounds of static thrust, meaning thrust developed while stationary. The link is required while operating on plane or above displacement speed, except when the main helm is inside an enclosed cabin or the boat has no switch and is not required to have one. On plane describes a hull lifted partly out of the water by its motion. An open-helm 20-foot, 90-horsepower recreational boat with a working ECOS, operating on plane on U.S. navigable waters, falls within that use requirement.

Hazards that require different responses

Gasoline vapor and carbon monoxide (CO) must not be confused. If gasoline odor remains after fueling and ventilation, do not start the engine merely because the blower has run for a set time. CO from engines and generators is odorless and can accumulate outside near exhaust outlets as well as in cabins. Keep swimmers away from exhaust areas. A CO alarm or suspected poisoning calls for fresh air and help; headache and nausea near an operating engine warrant prompt removal from exposure and emergency medical assistance.

Close recovery of a person in the water requires protection from propulsion, including stopping the engine before bringing them beside the propeller area. After a capsize, a floating craft can provide support and make the party easier to find. Staying with it is generally preferable when shore is not safely reachable and no immediate hazard requires leaving. In cold water, reduce immersion where possible and conserve heat and energy when swimming cannot reach safety.

A marine very high frequency (VHF) radio provides a way to call for help. Grave and imminent danger, such as a sinking boat with people at risk, warrants a MAYDAY call on channel 16. Give the vessel's identity, location, nature of the emergency and number of people needing help. Recognizing the appropriate call is not the same as practicing a complete rescue or radio procedure.

Question selection and coverage

Topic, vessel context and difficulty jointly determine the eligible questions. Selection is repeatable from the seed and does not repeat a question within a round. It does not reserve an equal number of questions for every topic. The all-topic pool sizes show how the vessel and difficulty choices change the material that can be sampled.

Vessel context Foundations Applied scenarios Mixed difficulty
All vessel contexts 18 18 36
Motorboat + shared core 15 16 31
Paddlecraft + shared core 12 12 24

Motorboat and paddlecraft pools overlap; their counts must not be added to estimate the bank size. Selecting one safety topic narrows them further. Exact replay depends on keeping the setup, seed and question-bank version unchanged.

Correct answers, misses and completion

Each question has one keyed correct answer worth one point. Each other choice earns zero, with no partial credit, penalty, reverse scoring or difficulty weighting. Let C be the correct-answer count, A the answered count and N the selected count. These are integer question counts satisfying 0 ≤ C ≤ A ≤ N, with N ≥ 1. Score has point units; missed answers have count units; accuracy and progress have percent units. The equations separate correct answers from completion.

Score points = C Accuracy (%) = 100×CN Progress (%) = 100×AN Missed answers = A−C

N is also the possible point total, so scores range from zero to N. Unanswered questions remain in that denominator during an unfinished attempt, but they do not count as missed answers. Completion requires A to equal N. Topic totals are simple counts for questions in that topic, not separate proficiency scores.

Accuracy retains its unrounded ratio. Only the visible progress label rounds to the nearest whole percent, with half-percent ties upward; the main final result uses the exact correct-out-of-total fraction. There is no official pass mark, safety rating or severity band. A missed-answer retry starts its own calculation with a smaller N; it does not revise the original score.

Scope Notes:

The question bank is dated September 11, 2026 and records source checks on that date. It cites the U.S. Coast Guard's November 2023 federal guide and selected safety guidance. Its education scope reference is ANSI/NASBLA 100-2022 Basic Boating Knowledge—Core, effective June 1, 2022. NASBLA is the National Association of State Boating Law Administrators; ANSI is the American National Standards Institute.

These are original, unofficial practice questions, not official examination questions or an approved course. The bank is curated and does not claim complete coverage of that Core standard, state law or complete motorboat and paddlecraft curricula. There is no official affiliation or endorsement, certificate, credential reciprocity or guaranteed examination outcome.

A round does not check current charts, weather, local restrictions or a particular operator's legal eligibility. Use the destination boating authority, current navigation information, vessel-specific instructions and an approved course for those needs. The bank's source-check date is not a promise that every rule remains current for every waterway.

Privacy Notes:

Scoring happens in the browser, but the page address also stores the setup, seed, selected answers and current position in the attempt, including unfinished rounds. Someone who receives that address can restore those choices when the saved attempt remains compatible. Saved attempt data in the URL is not encrypted or private progress storage. Avoid putting personal information in a replay seed.

Such addresses may remain in browser history or be transmitted when loaded or shared. Clearing the current attempt does not erase copies already saved or sent. There is no account-based learning record. If Saved attempt unavailable appears, choose valid settings and select Start practice for a clean round. An invalid or incompatible older link cannot establish a score.

The topic chart loads an externally hosted resource when needed. Browser scoring therefore does not establish fully offline operation, zero network activity or a guarantee about site-wide logging and retention.

Worked Examples:

A normal gauge on an over-age extinguisher

Choose Safety equipment, Motorboat + shared core, Applied scenarios and two questions. This includes the child's life-jacket fit question and the 14-year-old disposable-extinguisher question, though their order can vary with the seed. Answer the fit question correctly but choose to retain the old extinguisher because its gauge looks normal. The final result is 1/2, or 50% accuracy. The correction identifies manufacture age as the missed condition. Retry missed then contains only the extinguisher question; correcting it produces a separate 1/1 result, not a revised 2/2 for the first attempt.

Finishing a weather round without early corrections

Select Weather & water, Motorboat + shared core, Applied scenarios, three questions and At the end. This pool contains returning before a nearby storm, cold shock and reassessing changing weather. Correctly choose an early safe return and reassessment, but miss the cold-shock question. After the last selection, progress reaches 100% and the answers remain locked without early correctness feedback. View results reveals 2/3 correct. The calculated accuracy is about 66.67%, although the visible completion bar has already reached 100%. The missed explanation connects worn flotation to sudden breathing and movement problems rather than claiming it provides complete protection from cold.

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