M2279

The agreement between the contractor and the charterer stipulated specific technical requirements for the OSV, including having a ‘Follow Target’ function and being capable of dealing with the expected movement velocities of the FPSO, which can be considerable. This function is crucial for maintaining a safe distance and alignment with the FPSO. The OSV in question was only equipped with a DP 1 (Dynamic Positioning Class 1) system, which typically does not include a ‘Follow Target’ capability. This discrepancy meant that the OSV did not meet the contractual requirements necessary for safe operations with the FPSO.

Despite not meeting these requirements, the OSV’s master proceeded with the operation under pressure from the client’s schedule. This decision led to potentially unsafe conditions because the vessel lacked the automated capability to maintain safe proximity and alignment with the FPSO. The crew recognised the compromised safety conditions during the operation, particularly during a critical 12-hour plus fuel oil transfer. They resorted to manual adjustments based on visual and radar references, which are less precise and more prone to error compared to automated systems like ‘Follow Target’.

The crew’s awareness of the compromised safety and their decision to report this to CHIRP indicates a responsible approach to safety reporting and an understanding of the potential risks involved. The Designated Person Ashore (DPA), who is responsible for ensuring compliance with safety and environmental standards, ensuring adequate resources are applied, and providing a vital link between the vessel and the company, cautioned against proceeding, given that the “follow target” function was required. This caution from the DPA underscores the seriousness of the safety concerns. Despite this explicit advice, the master proceeded with the operation, disregarding the DPA’s recommendations. This decision not only heightened the risk involved but also called into question the company’s safety culture and organizational structure. The master’s choice to ignore the DPA’s advice raises significant concerns about the prioritisation of safety within the company and highlights potential flaws in its risk management and communication practices.

In recent years, several collisions have occurred aboard vessels undertaking DP operations near mobile assets, such as drilling vessels and FPSOs. While having a relative position referencing system fitted, such as the “Follow Target” function, training on its use is essential.

CHIRP would like to acknowledge the Information note provided by the International Maritime Contractors Association (IMCA) No 1650- November 2023, which details the Important Position Reference Systems (PRS) considerations when operating close to an asset that is not rigidly fixed to the sea bed.