🔍 Key Concepts

• Rule 9 – Narrow Channels in the Navigation Rules • The meaning of “not to impede the passage” and which vessels this applies to • Which types of vessels are given special consideration in narrow channels

💭 Think About

• Look at Rule 9 and list the specific vessel types mentioned there. Which ones are told not to impede a vessel that can only safely navigate in the channel? • Compare that list from Rule 9 to the answer choices. Do all of the listed answer choices appear in Rule 9, or only some of them? • Ask yourself: does Rule 9 treat small power-driven vessels, sailing vessels, and fishing vessels the same way, or are some grouped together?

✅ Before You Answer

• Check the exact wording in Rule 9(b) and Rule 9(c) of the Navigation Rules • Verify which vessels are described as “not to impede the passage of a vessel which can safely navigate only within a narrow channel or fairway” • Confirm whether all three categories in the choices are named, or only certain specific ones, before deciding if “All of the above” fits the rule text