I find that It is not because the terrstrial mile 1609, 344 m is in a function of the meter as a unity of length puts the terrestrial mile in a direct link with the speed of light, a such thing is absolutely not correct in physics. It is familiar that the meter as unity of length is in a direct link with the speed of light according to the modern definition of the "meter'. But according to me the terrestrial mile has his proper link with the speed of light. We should have two things which are the time that takes light to travel a distance of one meter and the time that takes light to travel an exact terrestrial mile. According to me the exact time that takes light to travel a terrestrial mile is a new constant of physics which should proove or desapprove the exactitude of the current value of the speed of light 299792.458 km/sec . I doupt that this latter value is exact it exists another more precise value which is the one of Arne BJERHAMMAR of 1972 which is 299792.375 km/sec.