A weight of 250 tons is loaded on your vessel 95 feet forward of the tipping center. The vessel's MT1 is 1000 ft-tons. What is the total change of trim?
• Trim formula using MT1: how a longitudinal moment changes trim in inches • How to compute the trimming moment from a weight, a distance, and its direction (forward/aft)** • Relationship between feet, inches, and MT1 units (ft-tons per 1 inch of trim)
• What is the trimming moment created by a 250-ton weight placed 95 feet from the tipping center? Write it out as weight × distance. • Once you have the trimming moment, how do you combine it with MT1 to find trim in inches? Think about what “1 inch trim” means in terms of ft-tons. • After you get the trim in inches, does it represent total change of trim (difference between drafts forward and aft), or just at one end?
• Compute the trimming moment correctly: units should be in ft-tons. • Divide the trimming moment by MT1 (1000 ft-tons per 1 inch of trim) to get trim; make sure units cancel properly. • Confirm whether the result you get is the total change of trim (difference between forward and aft drafts), not a partial change at one end only.
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