If the navigation doesn't report speed detection, does it mean there's no speeding?

[DeCarson]

No, the navigation can only remind you whether there is speed detection ahead. You need to judge whether you are speeding by yourself. The following is a related introduction to car navigation: 1. Components: The car GPS navigation system consists of two parts. One part is composed of the GPS receiver and display device installed in the car; the other part is composed of the computer control center, and the two parts are connected via positioning satellites. 2. Working principle: In GPS observation, the distance from the satellite to the receiver can be obtained. Using the distance formula in three-dimensional coordinates and three satellites, three equations can be formed to solve the position of the observation point. Considering the error between the satellite clock and the receiver clock, there are actually four unknowns: X, Y, Z, and clock difference. Therefore, a fourth satellite needs to be introduced to form four equations for solving, thereby obtaining the longitude, latitude, and elevation of the observation point.