🔍 Key Concepts

• Rule 24 – Towing and Pushing in the Navigation Rules (what lights are required for towing astern) • Difference between masthead lights, stern light, and towing light (all are white but used differently) • How many lights are shown aft when towing and how they are arranged vertically

💭 Think About

• Ask yourself: when a vessel is towing astern, does it still need a normal stern light, or is it replaced by something else? • Think about whether a towing light is shown alone, or together with, or in addition to the stern light. • Visualize the stern of the tug: how many separate white/yellow lights are there, and are they directly above each other?

✅ Before You Answer

• Verify in Rule 24 whether a towing light is yellow and where it is placed in relation to the stern light. • Check if the rule says the towing light is in lieu of (instead of) the stern light or in addition to it. • Confirm how many towing lights are required for a simple tow astern (not a long tow, not a composite unit).