🔍 Key Concepts

• Rule 27 – Vessels Not Under Command or Restricted in Their Ability to Maneuver (Navigation Rules, Part C – Lights and Shapes) • The difference between red-over-red, red-white-red, red-over-white, and white-over-red all‑round light combinations • How sidelights (red/green) combine with special all‑round lights when a vessel is making way

💭 Think About

• First, identify exactly how many special all‑round lights are shown, their colors, and how they are arranged vertically. Which rule in Part C lists that exact vertical color combination? • Next, decide whether the green light in the illustration is likely a special all‑round light or a normal sidelight seen from the starboard side when the vessel is making way. • For each answer choice, recall its required night lights from the Rules. Which option’s required lights include the vertical red combination shown, possibly together with a green sidelight?

✅ Before You Answer

• Verify in Rule 27, Rule 26, and Rule 29 what color(s) and vertical order are prescribed for each vessel type listed in the choices. • Be sure whether two all‑round red lights together are associated with only one of the vessel types in the answers. • Confirm whether a vessel that is “not making way” would still show sidelights; this will help you interpret the green light in the picture.