Professional Analysis of Port State Control Deficiencies on Nigerian-Flagged Vessels in West African Ports

Port state control inspections serve as a critical external quality check on vessel safety and environmental compliance, and patterns of deficiencies identified during these inspections reflect the operational standards of flag state administrations. This study analyses the port state control deficiency records of Nigerian-flagged vessels detained or cited at ports within the Abuja Memorandum of Understanding on Port State Control region between 2020 and 2024. A professional documentation review methodology was adopted, supplemented by structured interviews with twelve port state control officers and five flag state inspection officials. Deficiency categories were classified and ranked by frequency, severity, and recurrence. Findings reveal that fire safety equipment, life-saving appliances, and certification deficiencies consistently account for the highest proportions of recorded deficiencies, mirroring global trends but at higher frequency rates relative to the Nigerian flag registry size. Structural equipment deficiencies, including hatch cover and piping integrity, are disproportionately prevalent compared to vessels under comparable regional flags. The study identifies inadequate pre-inspection preparation by shipowners and the limited capacity of the Nigerian flag administration's document verification processes as contributing factors. Recommendations include mandatory pre-inspection self-assessment checklists for vessel operators, increased frequency of Nigerian Maritime Administration and Safety Agency flag state inspections, and regional information-sharing on recurrent deficiency types to support targeted training. Keywords: port state control, Nigerian-flagged vessels, PSC deficiencies, Abuja MOU, maritime compliance