BOTH INTERNATIONAL & INLAND You see ONLY the...

Question 1 of 2707066636eeb28f7522a1c51bbd2

BOTH INTERNATIONAL & INLAND You see ONLY the light shown in illustration D080RR below. Which type of vessel are you observing?

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Question 1 of 27070

BOTH INTERNATIONAL & INLAND You see ONLY the light shown in illustration D080RR below. Which type of vessel are you observing?

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🔍 Key Concepts

• Review Rule 20-23 (lights and shapes for power-driven and sailing vessels) and compare them with Rule 26 – Fishing Vessels and Rule 29 – Pilot Vessels in the Navigation Rules. • Think about which vessel types use all-round colored lights (especially a single green all-round light) versus combinations of red/white, white over red, or flashing blue. • Remember that the question says you see ONLY one green light, not a combination of lights, and it applies to both International and Inland rules.

💭 Think About

• Which of the listed vessel types is specifically associated with a green all‑round light in its special lights, and how is that light normally combined with other colors? • For each option, picture (or sketch) its standard light configuration at night. Which ones MUST show more than one light or a different color pattern than what is illustrated? • Ask yourself: if you truly saw only a single green light, from what aspect or at what distance might you be viewing that vessel so that only that one special light is visible?

✅ Before You Answer

• Verify in the Navigation Rules which vessel type uses green all‑round lights as part of its identification lights. • Confirm that pilot vessels use a white over red vertical light combination and that law enforcement uses a flashing blue light (Inland), which do NOT match the illustration. • Check that a sailing vessel underway shows sidelights (red/green) and a sternlight, not a single isolated all‑round green light.