Abstract: The present invention relates to a vehicle monitoring system for improving the maintenance of equipment, in particular vehicles. One embodiment relates to of a monitoring system for attachment to a craft/vehicle and for monitoring the condition of said vehicle, comprising at least one inertial measurement unit configured to measure the triple-axis proper acceleration, velocity and angular orientation of the chassis of the vehicle sampled over a time period, at least one GPS receiver for measuring the location of the vehicle, a computer comprising memory and a processing unit configured for executing any of the methods described herein for assessing the condition of said vehicle.