Question 6 RVR05 - Master of LT 100 GRT

The Correct Answer is C. ### Why Option C is Correct: For the purpose of applying the International Regulations for Preventing Collisions at Sea (COLREGs) and Inland Rules, the "length of a vessel" is defined as the maximum **Length Overall (LOA)**. This is the distance measured from the extreme forward end (including permanent structure) to the extreme after end (including permanent structure). In diagrams illustrating vessel dimensions, measurement C universally represents the Length Overall (LOA), which is the definition used to determine which specific lights, shapes, and sound signal rules apply to the vessel (e.g., vessels less than 12m, less than 20m, or 50m or more). ### Why Options A, B, and D are Incorrect: * **A and B (Typically Length Between Perpendiculars or Waterline Length):** These measurements (LBP or LWL) are important for naval architecture, tonnage calculation, and stability analysis, but they do not represent the maximum physical length (LOA) of the vessel. The Rules require the use of the maximum physical length for regulatory purposes. * **D (Likely Draft, Freeboard, or Tonnage Depth, or a Partial Length):** Measurement D would typically represent a vertical dimension (like Draft or Depth) or a length measurement significantly shorter than the LOA. Neither of these serves as the regulatory definition of a vessel's length required by the Rules.