But the length at the water line of a Nimitz class carrier is 1,040 feet... Based on the well known formula for hull speed(1.34x sqrt of the length of the waterline), that puts the max speed of them at about 43 knots... Or right about 50mph. While some designs allow for exceeding hull speed, It's fairly doubtful that a ship the size of an aircraft carrier can utilize those methods. It's possible that they don't have the engine power to make 43 knots, but I bet that they come very close to it.
Actually, most cats will have an estrus cycle (the technical name for heat) within six to eight weeks after giving birth. In rare occasions, a cat will have an estrus cycle within a week after her kittens were born.
Gestation or the length of pregnancy of a cat averages 64 days. It is generally between 62 and 67 days or about 9-10 weeks. You might notice subtle indications of pregnancy after the first 3 weeks. The catâs nipples will begin to swell and their color will change from white to a rosy pink.