What specific equipment does combined driving require beyond standard driving harness?

Combined driving requires several pieces of equipment specific to the demands of cross-country marathon driving that differ from the equipment appropriate for pleasure driving or dressage driving. The marathon vehicle is a specialized piece of equipment designed for the demands of cross-country driving rather than for arena or road use. Marathon vehicles are typically lower to the ground for stability through tight turns and rough terrain, built with significant structural reinforcement to withstand the forces of obstacle navigation, and equipped with effective braking systems that allow the driver to manage downhill sections and sudden stops safely. Most serious combined driving competitors own or access both a marathon vehicle and a presentation vehicle for dressage and cones phases. The grooms — passenger riders who sit at the rear of the vehicle during the marathon — are a specific personnel requirement of combined driving that does not exist in pleasure driving. Grooms may assist with hazard navigation by shifting their weight to improve vehicle balance in tight turns and may in some competition formats dismount to assist with vehicle extrication if the vehicle becomes stuck in an obstacle. Protective equipment for both horse and driver is more important in marathon driving than in any other driving phase, given the physical demands and the close proximity to obstacle materials during hazard navigation. Appropriate safety helmets, body protectors, and horse leg protection are strongly recommended and in many competition formats required. Pre-competition technical inspection verifies that required safety equipment is present and that prohibited items are not in use.