BOTH INTERNATIONAL & INLAND A vessel is...

🔍 Key Concepts

• Check Annex I & Rule 22–24 for how many lights each special vessel shows (especially at anchor vs underway). • Recall the common mnemonic for a pilot vessel’s lights and compare the colors and order you see here. • For vessels aground or dredging, think about whether they show one, two, or three all-round lights, and which colors/sequence they use.

💭 Think About

• Look at the illustration: you have two vertically aligned all‑round lights, upper and lower. Which of the answer choices normally uses exactly two special all‑round lights (ignoring sidelights and sternlight)? • For a vessel aground or dredging, do they add extra red or green lights in addition to anchor lights? How many total would that be compared to the figure shown? • For a pilot vessel NOT on duty, would it still show its distinctive white-over-red pilot lights, or only the normal power‑driven vessel lights? How does that help you rule out one option?

✅ Before You Answer

• Be sure you know the exact light pattern for a pilot vessel engaged on pilotage duty (colors, order, and whether they are all‑round). • Confirm how many and what color lights a vessel aground under 50 m must display at night (anchor light(s) plus additional lights). • Verify that a dredge at anchor with an obstruction shows three or more special all‑round lights (red/red/green combinations) rather than just two.

BOTH INTERNATIONAL & INLAND A vessel is displaying ONLY the lights shown in illustration D045RR below. What type of vessel could this be?

vessel engaged in dredging at anchor with an obstruction on one side

vessel aground less than 50 meters

pilot vessel less than 50 meters, underway and NOT engaged on pilotage duty

vessel engaged in fishing

🔍 Key Concepts

💭 Think About

✅ Before You Answer