mechanical wear the accelerometer can be turned off to draw minimal current while the boat is not moving this information will be used to turn off the radio transmitter and cpu to further reduce current draw allowing the device to sit idle drawing minimal current the accelerometer can be re calibrated in circuit by issuing a command to the device via remote control accelerometers can be used to measure more than just the seat movement in a further embodiment they can be attached to the power hand wrist or forearm of each rower in an eight oared shell that would be the hand holding the end of the oar handle alternating seats would have the accelerometer on alternating wrists this allows for measurement of both the up down motion and the back forward motion of the wrist or oar handle and provides comparative information on the positioning of all the rowers on each side of the boat giving the coach or coxswain information on whose hand heights vary the most from the other rowers and whose hand speed is different from the stroke 39 s hand speed in a further embodiment shown in fig1 a and 3a attached to seat mount 31 on each seat 10 are three wheels 20 and a fourth wheel 21 wheels 20 and.