The DEEP DRILLER is loaded as shown in the Sample Load Form Number 5 (Survival) when an unexpected slowly increasing starboard list and bow down trim occurs. A leak in 1S is found. By deballasting from ballast tanks 2S and 3S, the inclination slowly decreases. The increase in the transverse free surface corrections is __________.
⢠Free surface effect and how it changes when you deballast slack tanks ⢠How the transverse free surface correction is calculated from individual tank free surface moments ⢠What happens to total free surface correction when you remove ballast from certain tanks but still have a damaged/partially filled compartment
⢠Compare the free surface contributions of tanks 2S and 3S before and after deballastingâare they slack, pressed up, or empty in each condition? ⢠Think about whether the damaged tank 1S is contributing a larger, smaller, or unchanged free surface effect after deballasting from 2S and 3S. ⢠Ask yourself: does the total transverse free surface correction (sum of all tanks/compartments) increase or decrease when you remove ballast from side tanks on the same side as the damage?
⢠Confirm which tanks are slack versus pressed up/full versus empty in the survival condition and after deballasting. ⢠Verify that the transverse free surface correction is based on the sum of individual free surface moments divided by displacementâdoes displacement change when you deballast? ⢠Double-check the units of the free surface correction (feet of GM correction) and ensure youâre comparing like with like from the sample load form.
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