My final year outcome is a wearable device for race marshals which tracks the position of the user to ensure they stay in a safe location. It uses Bluetooth modules to triangulate position and alerts the user when if they move into an unsafe zone on the racing surface. The Bluetooth modules use a 'traffic-light' system to differentiate zones based on their safety risk. This works in a two-step proximity system which will notify users in a sensory way - the device is programmed through an Arduino board to alert marshals in different ways based on the zone.