Accelerometers are used in down-hole drilling operations, e.g., oil, gas and geothermal, to navigate the drill in off-vertical directions
. In addition, accelerometers are used in other applications, such as in the measurement of the acceleration of a vehicle, in the measurement of the acceleration of a person, in the measurement of the acceleration of a person's head, in the measurement of the acceleration of a person's body, in the measurement of the acceleration