Question 1 OSV02 - Mate - Offshore Supply Vessels

The Correct Answer is B **Explanation for Option B (Correct Answer):** The term "Vessel constrained by her draft" is **defined and used exclusively in the International Navigation Rules (COLREGs), Rule 3(l) and Rule 18(d)**. This term is necessary in international waters where deep-draft vessels might be restricted in their ability to maneuver due to seabed topography. The **Inland Navigation Rules** (specifically 33 CFR Subchapter E, Part 83 – Inland Rules) **do not define or use the term "Vessel constrained by her draft."** Therefore, it is the term not defined in the Inland Rules. **Explanation for Other Options (Incorrect):** * **A) Seaplane:** This term **is defined** in the Inland Navigation Rules, Rule 3(a), which adopts the definitions of the International Rules (COLREGs Rule 3(b)) and applies them to the Inland Rules. * **C) Restricted visibility:** This term **is defined** in the Inland Navigation Rules, Rule 3(a), which adopts the definition of the International Rules (COLREGs Rule 3(l)) and applies it to the Inland Rules. It refers to any condition in which visibility is restricted by fog, mist, falling snow, heavy rainstorms, sandstorms or any other similar cause. * **D) Underway:** This term **is defined** in the Inland Navigation Rules, Rule 3(a), which adopts the definition of the International Rules (COLREGs Rule 3(i)) and applies it to the Inland Rules. A vessel is "underway" when she is not at anchor, made fast to the shore, or aground.