🔍 Key Concepts

• Navigation Rules – Part C (Lights and Shapes), especially Rules 23 and 24 • Differences between Inland and International (COLREGS) text for towing and pushing operations • Standard lights for a vessel not under command (NUC)

💭 Think About

• Compare the rule wording and diagrams for vessels pushing ahead in Inland vs International. Do you see any extra or different light requirements (for example, any special yellow lights or alternative arrangements)? • Look specifically at how barges being towed astern are treated in Inland vs International. Are there special inland-only options or provisions for unmanned/uninspected barges? • Ask yourself: Are the lights for a vessel not under command exactly the same in Inland and International, or is there any inland‑only difference described in the rules?

✅ Before You Answer

• Check in the Navigation Rules whether pushing ahead / alongside has additional Inland-only provisions that are not in the International text. • Verify if barges towed astern have specific Inland rules (like different requirements on stern or side lights, or exemptions) that are not present in the International rules. • Confirm whether the description of lights for a vessel not under command is identical in Inland and International, or if there is any separate inland paragraph. This will help you decide if that option belongs with the others.