A Solution to the Inherent List on Nimitz Class Aircraft Carriers

• Ballast type density
• Tank weight
Degree Increment:
• Weight
• Percent change
• A KG
• A Trim
3.2 Final Cost Estimation
Once <strong>the</strong> POSSE modeling analysis was complete, a final cost assessment was made
based on <strong>the</strong> new results for list correction in half degree increments up <strong>to</strong> 3 degrees for <strong>the</strong> T^
and 8"" deck tanks. Because <strong>the</strong> 8'*' deck tanks now had <strong>to</strong> be stiffened, <strong>the</strong> material costs and
material weights had <strong>to</strong> be determined. The production costs were assumed <strong>to</strong> be <strong>the</strong> same. This
information is included in Appendix G. Also, analysis on <strong>the</strong> T^ deck revealed that
compartment 2-250-2-V had <strong>to</strong> be used when trying <strong>to</strong> correct 3 degrees of list. Code 256
provided production and material costs as well as <strong>the</strong> material weights for tank prepping <strong>the</strong>
Perma Ballast® installation.
All cost estimations were calculated and derived as previously discussed in <strong>the</strong>
preliminary cost estimation section. This time, however, 2"^* deck tanks were based on
approximately 80% fillable capacity and S"" deck tanks were based on approximately 90%
finable capacity. When filled <strong>to</strong> <strong>the</strong>se capacities, canning plate work was not required.
Similarly, any additional weight added due <strong>to</strong> <strong>the</strong> addition of internal structures or stiffening was
again tabulated and tracked. Table 6 shows <strong>the</strong> <strong>to</strong>tal cost, <strong>to</strong>tal weight addition, and change in
KG for each half degree increment on both <strong>the</strong> T^ and 8'*' decks.
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