This document specifies objectives, functional requirements and guidelines for emergency response (ER) measures on installations used for the development of offshore hydrocarbon resources. It is applicable to: — fixed offshore structures; — floating systems for production, storage and off-loading. NOTE For mobile offshore units, the ER plans developed in conformance with the requirements and recommendations of the International Maritime Organization (IMO) are generally adequate for the normal, independent operation of the unit in most locations. The following aspects of ER planning are not generally addressed by IMO and are topics intended for inclusion in the scope of this document where relevant to the specific installation: — area evacuation, e.g. precautionary evacuation in areas of tropical revolving storms; — combined operations (where an integrated command and ER system is relevant); — arctic operations; — uncontrolled flow from a well.