To establish European Standards giving requirements for medical devices in air, water and difficult terrain ambulances. The requirements are being developed in co-operation with the drafting of standards by WG 1. Requirements will be developed for the ambulance role of air, water and difficult terrain vehicles, with particular regard to the provision of uninterrupted patient treatment and care during transport in and transfer between different types of ambulances. NOTE: The work will provide performance requirements and will refer to European Standards for medical devices where applicable. Non-dedicated ambulances are not covered by the scope of the Working Group.