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Whenever a new
component is added to the ship, it changes the hydrostatic equilibrium of the
ship and changes the draft, so the wetted surface area and the resistance.
The resistance calculations with electrical power requirements drive the
power needed to push the ship. When the propulsion configuration change, it
effects the amount of fuel required to fulfill the mission objective as well
as the weight of propulsion system itself. With these and newly added ship
components hull design and displacement changes again and the process repeats
itself until all requirements are covered.
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