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.
Unless you breed cats, you may not know much about what to do and what to look for when your cat is ready to give birth. Most often cats will deliver their young without any intervention needed from their owners. Many owners do worry when they see a lengthy break in-between the delivery of one kitten to the next. It can take up to 24 hours for a mother cat to deliver her full litter of kittens. Kitties need special attention when they are ready to give birth.