Question 1 TV02 - Towing Vessels - Great Lakes and Inland

**The Correct Answer is B** **Explanation for Option B ("Vessel constrained by her draft"):** The term "Vessel constrained by her draft" is **NOT** defined in the Inland Navigation Rules (33 CFR Subchapter E). This definition (Rule 3(h) in the international rules) is specifically included in the International Regulations for Preventing Collisions at Sea (COLREGS) to provide special privileges to deep-draft vessels navigating confined international waters. The U.S. Inland Rules intentionally omit this definition and the related operational requirements, meaning a vessel operating in inland waters cannot claim the status of being "constrained by her draft." **Explanation for Options A, C, and D (Why they are incorrect):** * **A) Seaplane:** This term **IS** defined in Inland Rule 3(j): "The term 'seaplane' means any aircraft designed to maneuver on the water." * **C) Restricted visibility:** This term **IS** defined in Inland Rule 3(l): "The term 'restricted visibility' means any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms or any other similar causes." * **D) Underway:** This term **IS** defined in Inland Rule 3(b): "The term 'vessel underway' means a vessel which is not at anchor, or made fast to the shore, or aground."