You are loading in a port governed by the tropical load line mark for a voyage to a port governed by the winter mark. The freshwater allowance is 5 inches, and the hydrometer reads 1.005. Which statement is TRUE?
• Load Line Zones and Seasonal Marks (tropical, summer, winter) and how they limit draft on different parts of a voyage • Freshwater allowance and how to adjust draft when loading in water that is not full saltwater, using hydrometer readings (e.g., 1.000, 1.005, 1.025) • The rule that the vessel must be loaded so she is compliant with the most restrictive load line expected on any part of the voyage
• Think about which part of the voyage gives you the smallest legal draft: the starting port (tropical) or the destination/route (winter) • How does a hydrometer reading of 1.005 compare to pure freshwater (1.000) and seawater (about 1.025)? How much of the 5-inch freshwater allowance can you actually use in this brackish water? • When you plan loading, do you only care about marks at departure, or do you have to remain compliant for every zone and season you will pass through?
• Identify which mark (tropical, summer, or winter) will apply on any leg of the voyage, and which is the most limiting draft • Calculate how much of the 5-inch freshwater allowance you can legitimately apply given a specific gravity of 1.005 (brackish, not true freshwater) • Check which option correctly reflects the idea that you must be legal at all points of the voyage, not just at departure or arrival.
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