Port State Control is the inspection of foreign ships in national ports to verify that the condition of the ship and its equipment comply with the requirements of international regulations and that the ship is manned and operated in compliance with these rules.

Many of the International Maritime Organisation’s (IMO) most important technical conventions contain provisions for ships to be inspected when they visit foreign ports to ensure that they meet IMO requirements.

These inspections were originally intended to be a back up to Flag State implementation, but experience has shown that they can be extremely effective, especially if organized on a regional basis. A ship going to a port in one country will normally visit other countries in the region before embarking on its return voyage and it is to everybody’s advantage if inspections can be closely co-ordinated.

This ensures that as many ships as possible are inspected but at the same time prevents ships being delayed by unnecessary inspections. The primary responsibility for ships’ standards rests with the Flag State – but Port State Control provides a “safety net” to catch substandard ships.

IMO has encouraged the establishment of regional Port State Control organisations and agreements on Port State Control – Memoranda of Understanding or MOUs – have been signed covering all of the world’s oceans: Europe and the North Atlantic (Paris MOU); Asia and the Pacific (Tokyo MOU); Latin America (Acuerdo de Vina del Mar); Caribbean (Caribbean MOU); West and Central Africa (Abuja MOU); the Black Sea region (Black Sea MOU); the Mediterranean (Mediterranean MOU); the Indian Ocean (Indian Ocean MOU); and the Arab States of the Gulf (GCC MOU and Riyadh MOU).
On 1st January 2011 the Paris MOU introduced a new Port State Control inspection regime which will affect commercial yachts. This regime is called “The Hybrid European Targeting and Inspection System”, or “THETIS”, also known as the “New Inspection Regime” (NIR).

THETIS Inspection Brochure (231kb PDF)

How will THETIS affect commercial superyachts (15 kb PDF)


Paris Port State Control Rankings

Paris MOU Rankings 1st July 2015 (429kb PDF)

Paris MOU Rankings 1st July 2014 (117kb PDF

Paris MOU Rankings 1st July 2013 (121kb PDF)

Paris MOU Rankings 1st July 2012 (202kb PDF)

Part State Control Reporting Obligations (202kb PDF)

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