🔍 Key Concepts

• Rule 27 – Restricted in her ability to maneuver (RAM): what vertical red/white patterns mean • How lights change when a vessel is underway but not making way versus at anchor (Rules 27 and 30) • Special additional lights used by fishing vessels (Rule 26) and dredging vessels (also Rule 27)

💭 Think About

• First, identify what the central three-light pattern (red/white/red or otherwise) tells you about the vessel’s status and type of work. • Then ask: does the extra all‑round white light in the stack suggest anchor status, work lights, or normal steaming lights? Which of the options would need that? • Compare what extra lights a dredge or fishing vessel at anchor would show beyond their basic work lights. Would those extra lights be vertical or arranged horizontally to indicate a safe or obstructed side?

✅ Before You Answer

• Verify in Rule 27 what lights a restricted in her ability to maneuver vessel shows when underway but not making way – number of all‑round lights and their colors. • Check whether a dredge underway must show any additional red or green all‑round lights horizontally to mark the obstructed/safe side – are those visible in this illustration? • For a fishing vessel at anchor, verify in Rule 26 and Rule 30 how the fishing lights and anchor lights are combined vertically and what colors they must be.