Protection and indemnity insurance

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.

A P&I Club is a mutual insurance association that provides risk pooling, information and representation for its members. Unlike a marine insurance company, which reports to its shareholders, a P&I club reports only to its members. Originally, P&I Club members were typically shipowners, ship operators or demise charterers, but more recently freight forwarders and warehouse operators have been able to join.

Whereas the assured pays a premium to an underwriter for cover which lasts for a particular time (say, a year, or a voyage), a P&I Club member instead pays a "call". This is a sum of money that is put into the Club's pool, a kind of "kitty". If, at the end of the year, there are still funds in the pool, each member will pay a reduced call the following year; but if the Club has made a major payout (say, after an oil spillage) club members will immediately have to pay a further call to replenish the pool.

There is an International Group of P&I Clubs based at Peek House, London. These Clubs cooperate to provide funds in the event of huge claims using a complex system to determine liability.

The ancient Greeks created the practice of General Average in Rhodos island, and ancient Romans could be said to have had a rudimentary form of marine insurance.

However, a novel type of insurance that one would recognise as modern emerged in the London "coffee shops" in the 19th century. Shipowners and charterers would seek underwriters to insure their ships, and cargo owners (whether shippers, importers or consignees) would insure their cargoes. Carriers soon realised that often they might themselves be at fault should cargo be lost or damaged at sea, and they sought to take out third-party indemnity insurance in respect of cargo liability. Underwriters evinced an unwillingness to take on such open-ended risks, so shipowners responded by forming their own mutual P&I Clubs, acting as a shipowner's co-operative. An advantage was that a Club worked for the shipowners, thereby eliminating the underwriters' profit margins and making P&I Insurance significantly cheaper.

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