The COASTAL DRILLER is in transit loaded as shown in the Sample Load Form Number 1 (Rig Move). What would be the new KGT if, during the move, 170.9 kips of fuel oil is consumed from Diesel Oil Tanks 13 and 14?
• Weight removed effect on KG/KGT (when weight is taken off low in the vessel) • Using the displacement and LCG/TCG/VCG data from the Sample Load Form Number 1 (Rig Move) • How to compute the new KGT after a weight change using moments
• First, ask yourself: when you consume fuel from low tanks, does the overall KG (and KGT) go up or down, and why? • How do you calculate the moment of the weight being removed, and how does subtracting that weight and its moment change the overall KG? • Compare your computed change in KGT (increase or decrease, and by about how much) to the original KGT on the Sample Load Form; which answer choice best matches that adjusted value?
• Be sure you are using the correct tank vertical location (KG of Tanks 13 and 14) from the load form to get the moment of the fuel removed • Verify you update both total displacement and total vertical moment before recomputing KGT • Double-check whether KGT should numerically increase or decrease after burning fuel from those specific tanks, and eliminate any answer choices that change in the wrong direction or by an unrealistic amount
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