Flag state

The flag state is the one whose colors a ship flies and whose law it follows on the high seas, with the duty to enforce the international conventions on safety, maritime labor and pollution prevention. The Montego Bay convention requires a genuine link between ship and register, a requirement that open registers have emptied of meaning by admitting ships with no real connection, and which gave rise to the vocabulary of flags of convenience. Port state control partly compensates for that failure: regional memoranda inspect calling vessels, publish flag lists ranked by detention rate, and detain the worst performers. For the underwriter, flag is a composite criterion: it summarizes the likely quality of maintenance, exposure to international sanctions and the predictability of the law that will apply to a casualty. The problem solved is that of a movable asset which by nature escapes any permanent territorial jurisdiction.

Panama, Liberia and the Marshall Islands alone account for about 40% of world tonnage on UNCTAD figures, Liberia having overtaken Panama in 2024. The black list published each year by the Paris memorandum, which ranks flags on three years of detentions, works as an entry filter for protection and indemnity clubs as much as a rating factor for hull underwriters.

pavillon de complaisance, registre d'immatriculation