OBS Boat Operation & Docking Skills Flashcards

What is the general rule for determining how much anchor line (scope) to deploy?

Answer: 5:1 to 7:1 ratio of line length to water depth

A scope of 5:1 to 7:1 (line length to depth) is standard, with 7:1 recommended in rough conditions for maximum holding power.

When two boats are approaching head-on, what should BOTH operators do?

Answer: Each vessel turns to starboard so they pass port-to-port

In a head-on situation, both vessels must turn to starboard so that they pass each other on the port side.

What should you do if your boat runs aground?

Answer: Stop the engine immediately to avoid propeller and hull damage

Stopping the engine prevents propeller damage from debris and hull damage from continued forward momentum.

What is the purpose of a boat's trim adjustment?

Answer: To adjust the bow angle for optimal performance and fuel efficiency

Trimming the engine adjusts the bow's angle relative to the water, improving performance, fuel efficiency, and visibility.

How should a passenger move about a small boat safely?

Answer: Stay low, move to the centerline, and inform the operator before moving

Moving low and through the centerline keeps the boat's center of gravity stable and reduces swamping risk.

What is cavitation in the context of boat propellers?

Answer: Formation of vapor bubbles around the propeller that reduce thrust and cause damage

Cavitation occurs when low pressure causes water to vaporize around propeller blades, reducing efficiency and eroding the metal over time.