Question 1 ONC07 - OUPV-Near Coastal

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 Rules (COLREGs)**, found in Rule 3(l) and Rule 8(f). This status is necessary internationally because certain waters are shallower and ships may need special signals and right-of-way consideration. However, the **Inland Navigation Rules** (33 CFR Subchapter E, Part 83) do **not** define this term. Inland waterways are generally well-marked and shallower, meaning a vessel needing draft consideration is typically managed through the existing definitions of "vessel restricted in her ability to maneuver" (which is defined in Inland Rule 3(g)) or is simply required to adhere to the existing narrow channel rules without a dedicated status flag. **Explanation for Option A (Seaplane):** This option is incorrect because **"Seaplane" is defined** in the Inland Navigation Rules (Rule 3(m)): "The term 'seaplane' includes any aircraft designed to maneuver on the water." **Explanation for Option C (Restricted visibility):** This option is incorrect because **"Restricted visibility" is defined** in the Inland Navigation Rules (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." **Explanation for Option D (Underway):** This option is incorrect because **"Underway" is defined** in the Inland Navigation Rules (Rule 3(j)): "The term 'underway' means that a vessel is not at anchor, made fast to the shore, or aground."