🔍 Key Concepts

• Inland Navigation Rules relating to leaving a dock or berth • Difference between signals for leaving a berth and signals for restricted visibility • When sound signals are required versus when they are optional

💭 Think About

• Ask yourself: Under Inland Rules, is a vessel required to sound a signal every time it leaves a dock, or only under a specific condition? • Consider which of the answer choices actually appears in the Inland Rules language connected with leaving a dock or berth. • Think about whether the rule is about the type of vessel, the weather/visibility, or the maneuver being made.

✅ Before You Answer

• Look up the Inland Rule that specifically mentions leaving a dock or berth and note the exact condition tied to the prolonged blast. • Verify whether the prolonged blast in this context is connected to restricted visibility or is a separate requirement. • Confirm whether the rule applies to all vessels or only a particular class (e.g., power-driven vessels).