This European Standard specifies minimum performance requirements for interfaces of medical devices used within air, water, and difficult terrain ambulances. Exclusions: the standard specifically excludes consideration of the design and ergonomic requirements of the vehicle or craft. Specific requirements for permanent outdoor use and storage of medical devices are excluded from this standard. NOTE Requirements for road ambulances and air, water and difficult terrain ambulances can be found in EN 1789 and prEN 13718-2 (see Bibliography).