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Flag of convenience

Flag of convenience (FOC) refers to a business practice whereby a ship's owners register a merchant ship in a ship register of a country other than that of the ship's owners, and the ship flies the civil ensign of that country, called the flag state. The term is often used pejoratively, and although common, the practice is sometimes regarded as contentious.

Each merchant ship is required by international law to be registered in a registry created by a country, and a ship is subject to the laws of that country, which are used also if the ship is involved in a case under admiralty law. A ship's owners may elect to register a ship in a foreign country so as to avoid the regulations of the owners' country, which may, for example, have stricter safety standards. They may also select a jurisdiction to reduce operating costs, avoiding higher taxes in the owners' country and bypassing laws that protect the wages and working conditions of mariners. The term "flag of convenience" has been used since the 1950s. A registry which does not have a nationality or residency requirement for ship registration is often described as an open registry. Panama, for example, offers advantages such as easier registration (often online), the ability to employ cheaper foreign labour, and an exemption on income taxes.

The modern practice of registering ships in a foreign country began in the 1920s in the United States when shipowners seeking to serve alcohol to passengers during Prohibition registered their ships in Panama. Owners soon began to perceive advantages in terms of avoiding increased regulations and rising labor costs and continued to register their ships in Panama even after Prohibition ended. The use of open registries steadily increased, and in 1968, Liberia grew to surpass the United Kingdom with the world's largest ship register.

Traditional maritime nations, mainly from Europe, responded to this practice with creation of so-called "second registers": open registries, using national flags or flags of semi-sovereign offshore dependencies. That process begun in 1984 with the Isle of Man registry created as a second UK register. Soon after Norway and the Netherlands followed this practice adopting Norwegian International Ship Register (NIS) and Netherlands Antiles respectively. France established in 1989 Kerguelen Islands Register (replaced by International French Register (Registre International Français - RIF in 2005) and Germany (Federal Republic of) created German International Register (GIS) in the same year. The last two registries are still (in 2025) considered as flags of convenience.

As of 2025, more than half of the world's merchant ships in terms of deadweight tonnage are registered in open registries.

Open registries have been criticised, mainly by trade union organisations based in developed countries, especially those in the European Union, United States, Japan, Canada, or the United Kingdom. One criticism is that shipowners who want to hide their ownership may select a flag-of-convenience jurisdiction which enables them to be legally anonymous. Some ships with flags of convenience have been found engaging in crime, offering substandard working conditions, and negatively impacting the environment, primarily through illegal, unreported and unregulated fishing. Prior to the implementation of the International Convention on Tonnage Measurement of Ships, 1969, shipowners may have selected a jurisdiction with measurement rules that reduced the certified gross register tonnage of a ship, to reduce subsequent port of call dock dues. Such was a consideration when Carnival Cruise Line changed the flag of the RMS Empress of Canada in 1972 to that of Panama.[citation needed] In 2011, Cunard Line registered all its ships in Bermuda, which, besides other considerations, enabled its ship captains to marry couples at sea. Weddings at sea are described as a lucrative market.

Maritime industry practitioners and seafarers from other countries contend that this is a natural product of globalisation. Supporters of the practice, however, point to economic and regulatory advantages, and increased freedom in choosing employees from an international labour pool. Publications from as early as 1962 argue that shipowners from developed countries use the practice to be competitive in a global environment.

In 2010 in a message connected to the World Maritime Day, the Secretary-General of the International Maritime Organization gave recognition to the present status of the open registries and noted that the seafarers from some developing countries are providing major source of foreign currency to their home economies:

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