Question 52 GLI02 - Mate of Unlimited Tonnage

The Correct Answer is B **Explanation for B (LBP):** LBP stands for **Length Between Perpendiculars**. The LBP is the standard naval architectural measurement that defines the horizontal distance between the Forward Perpendicular (FP) and the After Perpendicular (AP). The FP is typically taken at the intersection of the stem and the summer load waterline, and the AP is typically taken at the centerline of the rudder post (or the centerline of the rudder stock if there is no post). This measurement directly corresponds to the definition provided: the horizontal distance between perpendiculars taken at the forward-most and the after-most points on the waterline at her deepest operating draft (i.e., the design waterline). **Why the other options are incorrect:** * **A) LLL (Load Line Length):** While this term relates to regulatory measurements and is often similar to LBP or LWL, it is not the universally standard naval architectural abbreviation for the distance between the forward and after perpendiculars. * **C) LOA (Length Overall):** LOA is the maximum length of the vessel measured from the extreme forward point (e.g., the tip of the bow) to the extreme after point (e.g., the stern or transom). This measurement includes projections and is always greater than LBP. * **D) LWL (Length Waterline):** LWL is the length of the ship exactly along the waterline (often the load waterline). While LWL is frequently very close to LBP, LBP is specifically defined by the perpendiculars (AP and FP) which mark the beginning and end points for official design and calculation purposes, making LBP the more precise and correct answer for this definition.