🔍 Key Concepts

• Rule 9 – Narrow Channels of the Navigation Rules • Difference between the starboard side and port side requirement in a channel • What the Rules say about crossing, overtaking, and anchoring in a narrow channel

💭 Think About

• Look at each choice and ask, “Does Rule 9 say this exactly, or is this adding something that isn’t in the rule?” • Which options use absolute language like “not overtake any vessels” or “only in the middle,” and does Rule 9 really prohibit or require that? • Think about where a vessel is supposed to keep in a narrow channel and what it must consider before crossing from one side to the other.

✅ Before You Answer

• Verify which side of the channel a vessel shall keep to under Rule 9(a). • Check if Rule 9 absolutely forbids all overtaking in a narrow channel, or if it allows it under certain conditions. • Confirm what Rule 9 says about crossing the channel and whether a vessel may do so if it would impede a vessel that can safely navigate only within that channel.