🔍 Key Concepts

• Rule 9 – Narrow Channels: vessels that can safely navigate only within a narrow channel must not be impeded by other vessels, including those engaged in fishing. • Rule 18 – Responsibilities Between Vessels: special rules apply to vessels engaged in fishing, but these do not override the narrow channel obligations. • Rule 34 – Maneuvering and Warning Signals: five short and rapid blasts indicate doubt or danger, not an agreement to a maneuver.

💭 Think About

• In a narrow channel, which vessel is more restricted in her ability to deviate from the channel: the tanker or the fishing vessel? How does that affect who must keep out of the way? • Does a vessel engaged in fishing always have priority over power-driven vessels, or are there situations (like narrow channels) where that priority is limited? • What is the purpose of five short and rapid blasts, and what kind of response (in terms of actions, not specific whistle signals) is expected from the other vessel?

✅ Before You Answer

• Verify in Rule 9(b) that vessels engaged in fishing shall not impede the passage of a vessel which can safely navigate only within a narrow channel or fairway. • Confirm in Rule 34(d) what five short and rapid blasts mean and whether they are a danger/doubt signal rather than a maneuvering agreement signal. • Check whether any whistle signal listed in the choices is actually prescribed in the Rules for this specific situation, or if the Rules emphasize avoiding impeding the other vessel instead.