(1) Ships reported by another Member State excluding unexpected factors; (2) ships involved in a collision, grounding or stranding on their way to port; (3) ships accused of an alleged violation of the provisions on discharge of harmful substances or effluents; (4) ships which have been maneuvered in an erratic or unsafe manner whereby routeing measures, adopted by the IMO, or safe navigational practices and procedures have not been followed; (5) ships which have been suspended or withdrawn from their Class for safety reasons after last PSC inspection; (6) ships which cannot be identified in the PMoU database.


Broadly, ships flying flags of Party States, when on international voyages. Each chapter (I to XII) defines the ships to which that chapter applies. Application may depend on type of ship (e.g. chapter X - High Speed Craft), or date of build (e.g. chapter II-1 - Construction - subdivision and stability, machinery and electrical installations), area of operation (e.g. chapter V - Safety of navigation), tonnage (e.g. chapter IV - Radio communications) or cargoes (e.g. chapter VI - Carriage of cargoes and oil fuels). Each chapter may also exempt certain ships from the chapter's requirements.