How inland and international rules treat a vessel not under command?

• A. Inland rules do not require any other vessel to take action.
• B. Both require other vessels to give way and avoid, but implementations of signals or special cases may differ.
• C. International rules require surrender of precedence but inland do not.
• D. They treat it identically with exactly the same signals.

Answer: (B)

When a vessel cannot maneuver as required by the rules, it is treated as not under command. In both inland and international regulations, other vessels must take action to keep well clear and avoid the not-under-command vessel. The not-under-command vessel itself must signal its condition so others know to give way, but the exact signals or day shapes used can differ between inland and international rules. That shared obligation to give way is why this option is the best: both systems require other vessels to act to avoid, even though the signaling details may vary.