Definition(s)
Detention
Intervention action taken by the port State when the condition of the ship or its crew does not correspond substantially with the applicable conventions to ensure that the ship will not sail until it can proceed to sea without presenting a danger to the ship or persons on board, or without presenting an unreasonable threat of harm to the marine environment, whether or not such action will affect the normal schedule of the departure of the ship.
Source: IMO resolution A.1052(27), Procedures for Port State Control, 2011, 201 December 2011, International Maritime Organization. Regulatory Guidance