BOTH INTERNATIONAL & INLAND A vessel...

🔍 Key Concepts

• Review Rule 23 – Power-driven vessels underway and note what two masthead lights in a vertical line indicate. • Compare with Rule 27 – Vessels not under command (what colors are required and how many, and are they all-round or not?). • Compare with Rule 26 – Fishing vessels and Rule 24 – Towing and pushing to see what additional or different lights those vessels must carry.

💭 Think About

• Look at the arrangement: two white lights in a vertical line plus a single green light off to one side. Ask yourself: are those white lights masthead lights or all-round lights, and is that green light likely a side light? • For each choice (not under command, >50 m power-driven, fishing, towing astern), picture its required night lights and see which exactly matches this pattern and which require extra colors (red, yellow, more greens, or stern/towing lights) that are not shown here. • Think about what special lights a towing or fishing vessel would display in addition to normal running lights. Does the illustration show any of those ‘extra’ lights?

✅ Before You Answer

• Be sure whether the two white lights are masthead lights (forward-facing, not all-round) or all-round lights; the rule citations will make this clear. • Confirm what color combination identifies a vessel not under command and whether any sidelights are shown there. • Verify which type of vessel is required to show two masthead lights in a vertical line when its length exceeds 50 meters, along with normal sidelights.

BOTH INTERNATIONAL & INLAND A vessel displaying the lights shown in illustration D063RR below is which of the following?

not under command

underway and more than 50 meters in length

fishing

towing astern

🔍 Key Concepts

💭 Think About

✅ Before You Answer