A disabling casualty has what characteristic?

• A. Makes the boat not serviceable
• B. Causes minor issues
• C. Reduces speed only
• D. Has no effect on seaworthiness

Answer: (A)

A disabling casualty is a failure or damage that renders the vessel not serviceable, meaning it cannot safely operate or carry out its mission until repairs are made. This directly affects seaworthiness because the boat is no longer fit for sea duty. Choices describing only minor issues, just a reduction in speed, or no effect on seaworthiness are non-disabling. That is why the option stating the boat becomes not serviceable is the correct characterization.