Last updated on Jan 27, 2024

How do you choose a dynamic positioning system for a fast ferry?

Dynamic positioning (DP) is a technology that allows a vessel to maintain its position and heading by using thrusters and propellers. DP is essential for many offshore operations, such as drilling, pipe-laying, diving, and surveying. But did you know that DP can also be used for fast ferries, which are high-speed passenger and cargo vessels that operate in coastal and inland waters?

Fast ferries face many challenges, such as weather, waves, currents, traffic, and docking. To ensure safety, efficiency, and comfort, they need a reliable and responsive DP system that can adapt to changing conditions and maneuver smoothly. But how do you choose a DP system for a fast ferry? Here are some factors to consider:

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1 Type of DP system

When it comes to dynamic positioning (DP) systems, the level of automation and redundancy determines the type of system that is necessary. The most common are DP0, DP1, DP2, and DP3. DP0 is manual control with no position reference system or DP computer. DP1 is automatic control with one PRS and one DP computer. DP2 has two independent PRSs and two DP computers. Lastly, DP3 has three independent PRSs and three DP computers, plus additional backup equipment. The type of system you need depends on the risk and complexity of your operation; for example, fast ferries may only need a DP1 or DP2 system, while offshore oil and gas operations may require a more critical system such as a DP3.

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Kumanini Adu Gyamfi

CEO @ KIMEC | Industrial Maintenance, Growth Strategy
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One thing i have found helpful is that DPO,DP1,DP2 is normal used for oil and gas operating system for offshore Vessels Platform and rigs but when it comes to offshore oil and Gas operation may require DP3 which is more critical system

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2 Position reference system

A PRS is a device that provides information about the vessel's position and movement relative to a fixed or moving point. There are various types of PRSs, such as GPS, DGPS, laser, radar, and acoustic. The choice of PRS depends on the availability, accuracy, and reliability of the signal in your operating area. For instance, GPS or DGPS may be the most suitable for fast ferries as they are widely available and accurate. On the other hand, laser, radar, or acoustic PRSs may be used as backup or for specific situations like docking or navigating in narrow channels.

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3 Thruster configuration

A thruster is a propeller that provides thrust in any direction. The number, type, and location of thrusters can affect the performance and maneuverability of the DP system, which can range from fixed to tunnel, azimuth to podded. The configuration of thrusters depends on the size, shape, and speed of the vessel, as well as environmental forces and operational requirements; for example, fast ferries may require azimuth or podded thrusters for higher thrust and flexibility, while fixed or tunnel thrusters could be used as auxiliary or for redundancy. Selecting a DP system for a fast ferry is a complex process that requires an in-depth analysis of the vessel's characteristics, operating conditions, and safety standards. Ultimately, the right DP system can improve performance and profitability of your fast ferry service while providing passengers and crew with an increased level of satisfaction and safety.

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