Before answering this question, we need to understand the unit of velocity of knots. A knot is a unit used to express the speed of ships and aircraft, and 1 knot is equal to 1 nautical mile per hour. Well, a speed of 30 knots means 30 nautical miles per hour.
Next, we need to convert the speed in nautical miles into the speed of kilometers. We know that 1 nautical mile is equal to 1852 km. Therefore, the speed of 30 knots converted to the speed of kilometers is 30 x 1852 = 55.56 kmh.
Now let's answer the question, why are aircraft carriers moving at speeds around 30 knots. First of all, an aircraft carrier is a large **, and its main task is to provide air support and long-range strike capabilities. In order to better accomplish these tasks, aircraft carriers need to have the ability to move at high speeds for rapid deployment to the theater of operations. Secondly, the size and weight of the aircraft carrier are very large, so its speed must not be too fast, otherwise it will affect the health of the officers and men on board. Therefore, a speed of about 30 knots is a relatively reasonable choice, which can not only meet the operational needs of the aircraft carrier, but also will not have much impact on the officers and men on the ship.
As for how fast it is to change 30 knots to a car, we have calculated that the speed of 30 knots is 5556 kmh. This speed is equivalent to the speed of an ordinary car, but it should be noted that the speed of an aircraft carrier and the speed of a car are different in terms of usage scenarios and requirements. Aircraft carriers need to travel at sea and face complex environments and conditions, while cars are mainly driven on land and the conditions are relatively simple. Therefore, although they have the same velocity value, the actual meaning and application scenario are different.