🔍 Key Concepts

• Rule 20-25 – Lights and Shapes (International & Inland) • Special rules for small vessels and combined lanterns • Differences between power-driven, sailing, and fishing vessels’ light requirements

💭 Think About

• Which type and size of vessel is specifically allowed by the Rules to show sidelights and stern light in a single combined lantern? • How do the light requirements change when a sailing vessel is also using her engine? • Do vessels engaged in fishing (trawling or other fishing) have any special restrictions about how their sidelights and stern light are displayed when making way?

✅ Before You Answer

• Check which exact length limit in meters the Rules give for using a combined lantern for sidelights and stern light. • Verify whether sailing vessels under sail alone have different options from sailing vessels also using machinery. • Confirm whether fishing vessels making way must keep their sidelights and stern light separate from their fishing lights.