Your vessel's draft is 16'-00" fwd. and 18'-00" aft. The MT1 is 500 ft-tons. How many tons of water must be shifted from the after peak to the forepeak, a distance of 250 feet, to bring her to an even draft forward and aft?
• Trim correction using MT1 (Moment to Change Trim 1 inch) • Relationship between change in trim, distance shifted, and weight shifted • Converting feet of trim difference to inches before using MT1
• What is the total difference in draft between forward and aft, and how many inches of trim must be removed to make the drafts equal? • When you shift weight from aft to forward, does this reduce or increase the trim by the stern, and how is the moment (weight × distance) related to MT1? • After you compute the required total trimming moment, how do you use the shift distance (250 ft) to find the actual weight to be shifted?
• Be sure you convert feet of trim difference to inches before using MT1 (which is per inch). • Confirm that the total trimming moment is calculated as MT1 × total inches of trim to be corrected. • Double-check that you divide the total trimming moment by the shift distance (in feet) to get the weight to be shifted.
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