This read-only value, in meters per second, reports the horizontal speed of the GPS device, calculated by the satellite from the change in horizontal position between two fixes over time. An admin tracking a mobile asset uses this to confirm whether the device is stationary or moving, and how fast, which is useful for fleet management or detecting unexpected movement of equipment. For example, if a router expected to be stationary at a fixed site suddenly reports a nonzero horizontal velocity, the admin might suspect the equipment has been moved or is in transit unexpectedly.