Human error is involved in between 80-85 % of maritime accidents (Hanzu-Pazara et al. 2008). Consequently, much resources are spent to improve human performance and reduce human error.Error and human reliability have been researched from multiple perspectives, i.e. preventive or reactive, and levels i.e. an individual-, team-, and all the way to the organizational-or societal level. This is necessary considering that human performance is influenced on all levels of analysis, from individual cognitive patterns to organizational structure.ABSTRACT: Pilotage operations require close interaction between human and machines. This complex sociotechnical system is necessary to safely and efficiently maneuver a vessel in constrained waters. A sociotechnical system consists of interdependent human-and technical variables that continuously must work together to be successful. This complexity is prone to errors, and statistics show that most these errors in the maritime domain are due to human components in the system (80 -85%). This explains the attention on research to reduce human errors. The current study deployed a systematic human error reduction and prediction approach (SHERPA) to shed light on error types and error remedies apparent in pilotage operations. Data was collected using interviews and observation. Hierarchical task analysis was performed and 55 tasks were analyzed using SHERPA. Findings suggests that communication and action omission errors are most prone to human errors in pilotage operations. Practical and theoretical implications of the results are discussed.