Which of the following should you ensure before casting off?

Ensuring that all passengers have life jackets on before casting off is essential for safety on the water. Life jackets are critical personal flotation devices that significantly increase the chances of survival in the event of an accident or if someone falls overboard. In a boating environment, where unforeseen circumstances can arise, having all occupants properly equipped with life jackets is a fundamental safety precaution mandated by law in many jurisdictions, including Louisiana.

While the other options address important aspects of boat readiness and safety—such as having adequate fuel, checking sail conditions for sailboats, and inspecting the rudder—the immediate priority should always be the safety of the passengers. Life jackets serve as the first line of defense against drowning, making it imperative to ensure they are worn before any boating activity begins.