Question 1 MODU02 - Barge Supervisor

The Correct Answer is B **Explanation for Option B (Vessel constrained by her draft):** The term "vessel constrained by her draft" (often abbreviated as CBD) is specifically defined and used in the **International Navigation Rules** (COLREGs), specifically in Rule 3(l) and Rule 18(d). It grants a vessel a special privilege in terms of right-of-way, subject to deep-water conditions and restricted maneuverability due to draft. However, the **Inland Navigation Rules** (33 CFR Subchapter E, Part 83) do **not** define or recognize the status of a "vessel constrained by her draft." This status is considered an international concept inapplicable to the typical operational environment of U.S. inland waters. Therefore, Option B is the term NOT defined in the Inland Rules. **Explanation for Other Options (Why they are incorrect):** * **A) Seaplane:** This term **is** defined in the Inland Navigation Rules (Rule 3 - General Definitions) as "any aircraft designed to maneuver on the water." * **C) Restricted visibility:** This term **is** defined and utilized throughout the Inland Navigation Rules (Part B, Rule 19). It refers to 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 the Inland Navigation Rules (Rule 3 - General Definitions) as a vessel that "is not at anchor, made fast to the shore, or aground."