The Nano 520 Explorer boosts up the power to 520 Newtons of thrust, propelling you to a whopping 18 km/h top speed. The power-to-weight ratio is 23.6 Newtons of thrust per kg. It also comes equipped with an onboard accelerometer. This meter provides you with an ‘attitude indicator’ formally known as a gyro horizon meter designed for featureless water, and low light diving this provides you with an artificial horizon reading as well as pitch and roll giving degrees of climb/descent and lateral banking.