Question 1

The Correct Answer is B **Explanation for Option B ("Vessel constrained by her draft"):** Option B is the correct answer because the term “Vessel constrained by her draft” is **not defined** in the Inland Navigation Rules (33 CFR Subchapter E). This specific term, along with its associated lighting and day shapes (Rule 28), is defined and applied exclusively within the **International Rules (COLREGs)**. The Inland Rules recognize that vessels may need deep water, but they do not confer a special status or specific definition/signal for a vessel constrained by her draft. *** **Explanation of Why the Other Options are Incorrect (They ARE defined in the Inland Rules):** **A) Seaplane:** This term is defined in Inland Rule 3(g) as "any aircraft designed to maneuver on the water." **C) Restricted visibility:** This term is defined in Inland Rule 3(l) as "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(i) as meaning that "a vessel is not at anchor, or made fast to the shore, or aground."