🔍 Key Concepts

• Rule 35 – Sound signals in restricted visibility • Difference between a power-driven vessel making way and underway but not making way • Which signals are used by vessels at anchor or aground vs. underway

💭 Think About

• First, decide: is a vessel that is stopped in the water but not anchored still considered underway under the Rules? How does that affect which part of Rule 35 applies? • Look at the specific wording in Rule 35 for a power-driven vessel making way compared to one underway but stopped. How do the signals differ? • Compare the options that use single prolonged blasts versus combinations of prolonged and short blasts. Which combinations are reserved for special vessel types (e.g., towing, restricted ability to maneuver)?

✅ Before You Answer

• Verify the exact phrases in Rule 35(a) and 35(b) and match them to the situation described in the question. • Confirm that none of the choices are the sound signal for a vessel at anchor (that is a different requirement in the same rule). • Check the time interval requirement in Rule 35 (e.g., not more than 2 minutes) and see which pattern in the choices corresponds to the correct description for a vessel underway but stopped.