Top priority factors are the following
- Ships suspended or withdrawn by the classification society for safety reasons since the latest inspection in the EU or the Paris MoU region.
- Ships that have been reported by another member State.
- Ships that cannot be identified in the inspection database.
- Ships that have been involved in a collision, grounding or stranding on its way to the port.
- Ships that have been accused of contravening the provisions on the discharge of harmful substances or waste water.
- Ships that have manoeuvred in a manner that is irregular or unsafe and, thus, have not observed the navigation practice and the procedures adopted by the IMO.

