INTERNATIONAL ONLY In addition to her...

🔍 Key Concepts

• International Rules – vessel constrained by her draught (check the definition and lights for this special status) • Difference between vessel not under command, restricted in ability to maneuver, and constrained by draught lights • Navigation Rules, International – lights for special classes of vessels (see especially the rule covering constrained by draught)

💭 Think About

• Ask yourself: which color and pattern is used to show a vessel whose movement is severely limited by the depth of water compared with her draught? • Match each choice with the status it normally indicates (e.g., not under command vs restricted in ability to maneuver vs constrained by draught). • Remember that each special vessel status has its own unique light pattern so they are not confused with one another at night.

✅ Before You Answer

• Verify in the International Rules which rule specifically describes a vessel constrained by her draught and its lights (hint: check the section on special vessels). • Confirm which status uses two all‑round red lights and which uses red–white–red so you can eliminate those options. • Make sure the pattern you choose matches a vessel that is limited primarily by her draught in relation to available depth of water, not by machinery failure or work underway.

INTERNATIONAL ONLY In addition to her running lights, a vessel constrained by her draft while underway shall carry which lights in a vertical line?

Two red lights

Two white lights

A red light, a white light, and a red light

Three red lights

🔍 Key Concepts

💭 Think About

✅ Before You Answer