Vessel Operation and Handling Flashcards
7 cards from real Boating Certification Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Vessel Operation and Handling flashcards as text
When fueling a powerboat, what should you do before starting the engine after fueling?
Answer: Run the blower for at least 4 minutes to clear fuel vapors
Gasoline vapors are heavier than air and can collect in the bilge; running the blower for at least 4 minutes before starting removes explosive fumes.
What is cavitation in the context of a boat propeller?
Answer: The formation and collapse of vapor bubbles around the propeller blades
Cavitation occurs when low pressure on the propeller blade surface causes water to vaporize, forming bubbles that collapse and damage the propeller.
When two power-driven vessels meet head-on, which action is required?
Answer: Both vessels alter course to starboard to pass port-to-port
In a head-on situation, both vessels must turn to starboard so they pass each other on their port (left) sides — a rule under COLREGS Rule 14.
What does 'planing' mean when describing how a powerboat operates?
Answer: The hull rides on top of the water rather than pushing through it
A planing hull rises up and skims across the water surface at higher speeds, reducing drag significantly compared to displacement mode.
Which of the following best describes 'dead reckoning' navigation?
Answer: Estimating current position using last known position, speed, and heading
Dead reckoning calculates your estimated position by starting from a known point, then applying speed, heading, and elapsed time to project forward.
When anchoring, a general rule for anchor scope in normal conditions is:
Answer: 5:1 to 7:1 ratio of line length to water depth
A 5:1 to 7:1 scope ratio (anchor line length to water depth plus freeboard) is recommended in normal conditions to ensure the anchor sets properly.
What is the safest way to retrieve a person who has fallen overboard (MOB)?
Answer: Keep the victim in sight, reduce speed, and approach slowly from downwind
Keep the MOB in constant sight, reduce speed, then approach slowly from downwind so the boat doesn't drift onto the victim.