Functions are prewritten formulas. Functions differ from regular formulas in that you supply the value but not the operators, such as +, -, *, or /. For example, you can use the SUM function to add. When using a function, remember the following:
The US Navy no longer has nuclear powered cruisers or destroyers. The only nuclear powered surface ships are aircraft carriers. In general, the nuclear powered cruisers/destroyers could achieve speeds in excess of 30 knots (34 Miles Per Hour). Aircraft carriers must be able to achieve the same speed in order for them to be able to launch and recover aircraft. The US Navy no longer has nuclear powered cruisers or destroyers.
The commonly cited estimate of 25,000 Star Destroyers overall or their equivalent is not out of the ballpark, and deserves some consideration as well. If we assume a practical service life of 5 years during constant warfare and a fleet of 5,000, we get a typical production rate of 1,000 ISDs per year.