Protection and indemnity insurance, more commonly known as P&I insurance, is a form of mutual maritime insurance provided by a P&I club. Whereas a marine insurance company provides "hull and machinery" cover for shipowners, and cargo cover for cargo owners, a P&I club provides cover for open-ended risks that traditional insurers are reluctant to insure. Typical P&I cover includes: a carrier's third-party risks for damage caused to cargo during carriage; war risks; and risks of environmental damage such as oil spills and pollution. In the UK, both traditional underwriters and P&I clubs are subject to the Marine Insurance Act 1906.