How can you ensure your dynamic positioning system is reliable in extreme weather?

1 Choose the right DP class

Different DP systems have different levels of redundancy and tolerance to failures, depending on their class. According to the International Marine Contractors Association (IMCA), there are three main classes of DP systems: Class 1, Class 2, and Class 3. Class 1 systems can maintain position after a single fault, but may lose position in the event of a worst-case failure. Class 2 systems can maintain position after a single fault and a worst-case failure, but may lose position in the event of a second worst-case failure. Class 3 systems can maintain position after any single fault and two worst-case failures, and have additional physical separation and protection of equipment. Depending on the type and criticality of your operation, you should choose the appropriate DP class that can withstand the potential weather hazards and consequences of losing position.

3 Monitor the weather conditions and forecasts

Weather is one of the most important factors that affect the performance and reliability of DP systems. Weather conditions can change rapidly and unpredictably, creating challenges for DP operators and controllers. For example, high winds, waves, and currents can increase the power demand and stress on the thrusters, sensors, and power systems. Extreme weather events, such as storms, lightning, or ice accumulation, can damage or disrupt the communication, navigation, or control systems. Therefore, it is essential to monitor the weather conditions and forecasts regularly and accurately, using reliable sources and instruments. You should also have contingency plans and procedures in place to deal with any adverse weather situations that may arise, such as changing the DP mode, adjusting the thruster settings, or aborting the operation.

5 Train and certify the DP personnel

DP systems are not only dependent on the equipment, but also on the people who operate and control them. DP personnel, such as DP operators, DP controllers, DP supervisors, and DP engineers, need to have the appropriate skills, knowledge, and experience to operate and maintain the DP systems effectively and safely. They also need to be aware of the potential risks and hazards associated with DP operations, especially in extreme weather conditions. Therefore, it is important to train and certify the DP personnel according to the industry standards and guidelines, such as the IMCA M 117 The Training and Experience of Key DP Personnel, the IMCA C 011 Competence Assurance and Assessment Guidance Document for DP Positions, and the Nautical Institute DP Operator Certification Scheme. Training and certification should be conducted by qualified and accredited institutions and instructors, and should include both theoretical and practical components, such as simulators and on-board training.