25 multiple-choice questions for the boater safety (boating license) exam. Pick an answer to see the rule behind it, quoted from the official source.
1. A vessel of less than 50 meters in length is anchored. What lighting option is permitted instead of the standard anchor lights prescribed in paragraph (a)?
Answer: An all-round white light where it can best be seen. Vessels under 50 meters have the option to simplify their anchor lighting to a single all-round white light.
33 CFR § 83.30(b): “A vessel of less than 50 meters in length may exhibit an all-round white light where it can best be seen instead of the lights prescribed in paragraph (a) of this Rule.”
2. What is the required flash frequency for a standard flashing light used on a vessel?
Answer: 120 flashes or more per minute. The definition of a flashing light in the rule specifies a minimum frequency of 120 flashes per minute, distinguishing it from the slower special flashing light.
33 CFR § 83.21(f): “Flashing light means a light flashing at regular intervals at a frequency of 120 flashes or more per minute.”
3. You are in sight of another vessel and are unsure if the other vessel is taking sufficient action to avoid a collision. How should you indicate this doubt?
Answer: Sound at least five short and rapid blasts on the whistle. When in doubt about another vessel's intentions or actions, the required signal is at least five short and rapid blasts.
33 CFR § 83.34(d): “the vessel in doubt shall immediately indicate such doubt by giving at least five short and rapid blasts on the whistle.”
4. When are two vessels deemed to be 'in sight of one another'?
Answer: When one can be observed visually from the other. The rule specifies that visual observation is the sole criterion for being 'in sight,' excluding radar or distance-based definitions.
33 CFR § 83.03(k): “Vessels shall be deemed to be in sight of one another only when one can be observed visually from the other.”
5. Which of the following conditions qualifies as 'restricted visibility' for the purpose of applying navigation rules?
Answer: Fog, mist, falling snow, heavy rainstorms, sandstorms, or any other similar causes. The regulation lists weather-related phenomena that reduce visibility as the definition of restricted visibility.
33 CFR § 83.03(l): “The term restricted visibility means any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms, or any other similar causes.”
6. You are operating a vessel less than 12 meters in length in restricted visibility and choose not to use the standard bell signals. What alternative action must you take?
Answer: Make some other efficient sound signal at intervals of not more than 2 minutes. Small vessels under 12 meters are not required to use standard bell signals but must provide an alternative efficient sound signal at least every 2 minutes.
33 CFR § 83.35(j): “A vessel of less than 12 meters in length shall not be obliged to give the above-mentioned signals but, if she does not, shall make some other efficient sound signal at intervals of not more than 2 minutes.”
7. A recreational vessel less than 12 meters in length does not carry a whistle. What requirement must this vessel meet regarding sound signals?
Answer: It must be provided with some other means of making an efficient sound signal. Vessels under 12 meters are not required to have the specific appliances (whistle/bell/gong) but must still have an alternative way to make an efficient sound signal.
33 CFR § 83.33(b): “A vessel of less than 12 meters in length shall not be obliged to carry the sound signaling appliances prescribed in paragraph (a) of this Rule but if she does not, she shall be provided with some other means of making an efficient sound signal.”
8. When operating in a narrow channel, what is the required position for a vessel proceeding along the course?
Answer: Keep as near to the outer limit of the channel or fairway which lies on her starboard side as is safe and practicable. The rule mandates staying near the starboard outer limit to ensure safe passage for opposing traffic.
33 CFR § 83.09(a): “A vessel proceeding along the course of a narrow channel or fairway shall keep as near to the outer limit of the channel or fairway which lies on her starboard side as is safe and practicable.”
9. Two power-driven vessels are meeting within half a mile. One vessel sounds one short blast to indicate it intends to leave the other on its port side. If the second vessel agrees with this maneuver, what action must it take?
Answer: Sound the same whistle signal and take the steps necessary to effect a safe passing. When a vessel agrees to a proposed passing maneuver signaled by one or two blasts, it must echo the signal and proceed to pass safely.
33 CFR § 83.34(a): “Upon hearing the one or two blast signal of the other shall, if in agreement, sound the same whistle signal and take the steps necessary to effect a safe passing.”
10. Who is authorized to obtain a chemical test from a vessel operator under this regulation?
Answer: Any law enforcement officer authorized under Federal, State, or local law. The definition of 'Law enforcement officer' includes not just Coast Guard personnel but also other authorized officers under various levels of law.
33 CFR § 95.010: “Law enforcement officer means a Coast Guard commissioned, warrant, or petty officer; or any other law enforcement officer authorized to obtain a chemical test under Federal, State, or local law.”
11. Which of the following is an accepted visual distress signal that can be used to meet the night-only requirement for a boat less than 16 feet?
Answer: An electric distress light meeting the standards of 46 CFR 161.013. The rule specifies that an electric distress light is the device required to meet the night-only requirement.
33 CFR § 175.130(a): “An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement.”
12. What condition regarding visible appearance disqualifies a portable fire extinguisher from being considered in good and serviceable working condition?
Answer: The extinguisher shows visible signs of significant corrosion or damage. The regulation lists visible signs of significant corrosion or damage as a condition that prevents an extinguisher from being considered serviceable.
33 CFR § 175.310(a): “The extinguisher does not show visible signs of significant corrosion or damage.”
13. When inspecting an inflatable Personal Flotation Device (PFD) for compliance, which component must be present and functional?
Answer: A manual inflation lanyard or lever that is not inaccessible, broken, or missing. The regulation requires that the manual inflation mechanism be accessible and functional, whereas detached tubes or compressed chambers are considered defects.
33 CFR § 175.23(c): “A manual inflation lanyard or lever that is not inaccessible, broken, or missing”
14. A recreational operator is navigating a vessel that is 15 meters in length at night. According to the rules, how may the sidelights be configured?
Answer: They may be combined in one lantern carried on the fore and aft centerline of the vessel. The rule permits combining sidelights into one lantern on the centerline for vessels under 20 meters, which includes a 15-meter vessel.
33 CFR § 83.21(b): “On a vessel of less than 20 meters in length the side lights may be combined in one lantern carried on the fore and aft centerline of the vessel”
15. Within what timeframe must a report be submitted if a person is injured and requires medical treatment beyond first aid?
Answer: Within 48 hours of the occurrence. The rule specifies a 48-hour window for reporting injuries requiring medical treatment beyond first aid.
33 CFR § 173.55(b): “Within 48 hours of the occurrence if a person is injured and requires medical treatment beyond first aid, or disappears from a vessel”
16. How does a state-established blood alcohol concentration level affect the federal standard for recreational vessel operators within that state's boundaries?
Answer: The state level applies instead of the federal level provided in § 95.020(a). The rule states that a specific state statute's level replaces the federal baseline within that state's geographic boundaries.
33 CFR § 95.025(b): “If the applicable State statute establishes a blood alcohol concentration level at which a person is considered or presumed to be under the influence of alcohol, then that level applies within the geographical boundaries of that State instead of the level provided in § 95.020(a) of this part.”
17. According to the responsibilities between vessels, which type of vessel must a sailing vessel underway keep out of the way of?
Answer: A vessel restricted in her ability to maneuver. The rule states that a sailing vessel must yield to vessels restricted in their ability to maneuver.
33 CFR § 83.17(c): “A sailing vessel underway shall keep out of the way of: (ii) A vessel restricted in her ability to maneuver;”
18. What specific document must be on board a leased or rented vessel if the certificate of number is retained on shore?
Answer: A copy of the lease or rental agreement containing the vessel number and the period of time leased. When the certificate is kept on shore, the lease agreement itself serves as the required on-board documentation, provided it includes the vessel number and lease duration.
33 CFR § 173.21(a): “For the vessel described in paragraph (b) of this section, a copy of the lease or rental agreement, signed by the owner or his or her authorized representative and by the person leasing or renting the vessel, that contains at least: (i) The vessel number that appears on the certificate of number; and (ii) The period of time for which the vessel is leased or rented.”
19. How should a power-driven vessel proceeding downbound with a following current in a narrow channel on the Great Lakes or Western Rivers handle an upbound vessel?
Answer: The downbound vessel shall have the right-of-way, propose the manner and place of passage, and initiate maneuvering signals. In these specific waters, the downbound vessel with the current has right-of-way and responsibility to propose the passing plan and signal.
33 CFR § 83.09(a): “Notwithstanding paragraph (a)(i) of this Rule and Rule 14(a) (§ 83.14(a)), a power-driven vessel operating in narrow channels or fairways on the Great Lakes, Western Rivers, or waters specified by the Secretary, and proceeding downbound with a following current shall have the right-of-way over an upbound vessel, shall propose the manner and place of passage, and shall initiate the maneuvering signals prescribed by Rule 34(a)(i) (§ 83.34(a)(i)), as appropriate.”
20. According to the Inland Navigation Rules, which of the following best describes a 'vessel engaged in fishing'?
Answer: Any vessel using nets, lines, trawls, or other apparatus that restricts maneuverability. The rule defines a fishing vessel based on whether the gear restricts maneuverability, excluding those using gear that does not restrict maneuverability.
33 CFR § 83.03(d): “The term vessel engaged in fishing means any vessel fishing with nets, lines, trawls, or other fishing apparatus which restricts maneuverability, but does not include a vessel fishing with trolling lines or other fishing apparatus which do not restrict maneuverability.”
21. What is the general responsibility of a seaplane on the water regarding other vessels?
Answer: It must keep well clear of all vessels and avoid impeding their navigation. The rule states that seaplanes must generally keep clear of vessels and avoid impeding their navigation.
33 CFR § 83.18(e): “A seaplane on the water shall, in general, keep well clear of all vessels and avoid impeding their navigation.”
22. If you are operating a vessel less than 20 meters in length in a narrow channel, what is your obligation regarding larger vessels?
Answer: You shall not impede the passage of a vessel that can safely navigate only within a narrow channel or fairway. Smaller vessels are required to yield space to larger vessels that are restricted to the narrow channel.
33 CFR § 83.09(b): “A vessel of less than 20 meters in length or a sailing vessel shall not impede the passage of a vessel that can safely navigate only within a narrow channel or fairway.”
23. You are operating a vessel that is 100 meters or more in length and are at anchor in restricted visibility. According to the rules, how must you sequence your bell and gong signals?
Answer: Ring the bell rapidly for about 5 seconds in the forepart, then immediately sound the gong rapidly for about 5 seconds in the after part. The rule specifies that for vessels 100 meters or longer, the bell is rung first in the forepart, followed immediately by the gong in the after part.
33 CFR § 83.35(g): “In a vessel of 100 meters or more in length the bell shall be sounded in the forepart of the vessel and immediately after the ringing of the bell the gong shall be sounded rapidly for about 5 seconds in the after part of the vessel.”
24. When using radar to determine the range of vessels or other objects in the vicinity, what additional assessment is specifically mentioned as possible?
Answer: A more exact assessment of visibility. The regulation states that radar use can allow for a more exact assessment of visibility when determining ranges.
33 CFR § 83.06(b): “The more exact assessment of the visibility that may be possible when radar is used to determine the range of vessels or other objects in the vicinity.”
25. If a vessel doubts the safety of a proposed maneuver signaled by another vessel's one or two blast signal, what is the required procedure?
Answer: Sound the signal specified in paragraph (d) of this Rule and take appropriate precautionary action until a safe passing agreement is made. When there is doubt about the safety of a passing maneuver, vessels must use the specific doubt signal and take precautions until the situation is resolved.
33 CFR § 83.34(a): “If, however, from any cause, the vessel doubts the safety of the proposed maneuver, she shall sound the signal specified in paragraph (d) of this Rule and each vessel shall take appropriate precautionary action until a safe passing agreement is made.”