🔍 Key Concepts

• Rule 3 – General Definitions in the Navigation Rules (definition of a vessel "underway") • The difference between underway and making way through the water • Situations where a vessel is not considered underway (anchored, aground, or made fast to the shore/bottom)

💭 Think About

• First, recall the exact conditions in Rule 3 that must ALL be true for a vessel to be considered "underway." Which three situations are specifically excluded? • Look at each choice and ask: Is this vessel attached to the bottom or shore in any way, or unable to move because it is stuck? • For the towing vessel that is "not making way," think carefully: Does a vessel need to be moving through the water to meet the definition of "underway," or just free to move and not anchored/grounded/moored?

✅ Before You Answer

• Verify from Rule 3 that a vessel is not underway if she is anchored, aground, or made fast to the shore/bottom. • Check whether a single point mooring buoy counts as being made fast to something attached to the bottom. • For each option, confirm: Is the vessel (1) at anchor? (2) aground? (3) made fast to shore or bottom? If any of these is yes, then it is not underway.