Dynamic positioning allows vessels to hold position and heading using their own thrusters, without anchors, making it essential for drilling, construction, diving support, pipelay, offshore supply and many other operations. This course explains what DP is, why it is used, how a DP system is laid out and what can be learned from DP incidents. It develops the control theory behind DP, including feedback loops, linear models, Laplace transforms, stability analysis and PID control, then examines the measurement systems that provide position, heading and environmental information, with filtering, validation and fault handling. Hydrodynamics covers environmental loads, vessel dynamics and wave effects. The course then addresses thrusters, power generation and thrust allocation, DP equipment classes, FMEA and redundancy, and finally operations, planning, watchkeeping, competence and integrated application cases.
Course at a glance: Duration 20 hours · Self-paced online · Level: Intermediate · 8 sections, 37 lessons, a 145-page downloadable course book
What you will learn
- Explain what dynamic positioning is, why it is used and how a DP system is configured.
- Describe DP failure modes such as drift-off and drive-off, and lessons from incidents.
- Apply feedback, linear modelling, stability analysis and PID concepts to DP control.
- Evaluate measurement systems for accuracy, latency, redundancy and failure modes.
- Interpret the hydrodynamic and vessel-dynamics factors that govern station-keeping performance.
- Compare propulsion, power and redundancy arrangements against DP equipment classes using FMEA.
- Assess DP system choices, planning and competence for offshore applications.
Inside the course: a high-level summary, section by section.
DP fundamentals
The course starts by defining dynamic positioning: a computer-controlled system that automatically maintains a vessel’s position and heading using its own propellers and thrusters. DP is used because it works in shallow and deep water, its cost and performance are largely independent of water depth, it allows rapid setup and relocation, and it can follow moving targets. Some of its most important advantages concern logistics, safety and how quickly a vessel can adapt to changing conditions. A DP system consists of a control system, position reference and sensor systems, thrusters and a power system, all of which must work together.
History and failures provide important lessons. In drift-off, loss of power or thrust leaves the vessel to drift under environmental forces alone. In drive-off, a control-system failure makes the thrusters act in the wrong direction and actively move the vessel away from position. For operators and designers, the key question is not only what failed but how much time remains to respond before the operation is compromised.
Control theory
Control theory provides the mathematical basis for DP. Feedback loops compare the measured position with the desired setpoint and command corrective thrust. Linear models and Laplace transforms describe system dynamics in a form that allows stability and response to be analysed. Poles and stability explain how the location of system poles determines whether a system settles, oscillates or diverges, and the Routh criterion provides a systematic stability check. PID control, combining proportional, integral and derivative actions, is explained in the DP context, showing how each term contributes to stiffness, steady-state accuracy and damping.
Measurement systems
A DP system must measure position, heading, vessel motions and environmental conditions. Position references include satellite navigation, hydroacoustic systems, taut wires and laser or radar systems, each with different accuracy, latency and failure modes. Orientation is measured by gyrocompasses and motion reference units, and environmental sensors measure wind. Filtering and validation combine measurements, reject outliers and separate low-frequency motion from wave-frequency motion, so that thrusters are not driven to follow every wave. The concept of the DP current, an estimated force that absorbs unmodelled effects, and the handling of sensor faults are also explained.
Hydrodynamics
Environmental loads from wind, waves and current must be counteracted by the thrusters. Hydrodynamic derivatives describe how forces depend on vessel motion, and ship stability modes explain the natural tendencies of a vessel in the horizontal plane. Nonlinear and wave effects, including mean and slowly varying wave drift forces, influence station-keeping performance. Station-keeping dynamics combine these elements, and wave feed-forward shows how measured or estimated wave drift forces can be compensated before they cause position error.
Thrusters, power and redundancy
Thrusters and propulsion units, including tunnel thrusters, azimuth thrusters and main propellers with rudders, are compared for DP use. Power generation and thrust allocation explain how required forces and moments are distributed among available thrusters while respecting limits and minimising power use. DP equipment classes define redundancy requirements, from systems without redundancy to systems designed to withstand single failures, including fire and flooding of a compartment. Failure mode and effects analysis identifies how single failures could affect position keeping and helps define the worst-case failure. A redundancy exercise applies these concepts.
DP operations
Operational uses include drilling, diving support, pipelay, cable lay, heavy lift, offshore supply and shuttle tanker loading. Planning and watchkeeping cover activity-specific operating guidelines, capability plots, consequence analysis and communication. People and competence highlight the role of training, experience and decision-making under pressure, and integrated application cases bring together control, measurement, hydrodynamics and redundancy in realistic scenarios.
How the parts of a DP system fit together
A central message of the course is that DP performance is a property of the whole system, not of any single component. A well-tuned controller cannot compensate for a position reference that jumps or freezes, and accurate sensors are of little use if the thrusters or power plant cannot deliver the required force when a generator trips. Similarly, hydrodynamic understanding tells designers how much thrust is needed in a given environment, while capability analysis shows the limiting weather for each operating configuration. The course therefore encourages learners to trace a disturbance through the full chain: an environmental change is sensed, filtered and interpreted by the controller, translated into thrust demands by the allocation logic, delivered by thrusters drawing on the power system, and finally reflected in the vessel’s motion. Thinking in this way helps engineers identify weak links, design meaningful redundancy and set realistic operating limits, and it helps operators understand why alarms, warnings and consequence analysis are structured as they are.
Why this matters in practice
DP incidents can lead to collisions, damaged subsea assets, injuries and environmental harm. Engineers, superintendents and operators who understand DP control, sensors, hydrodynamics and redundancy can design better systems, specify suitable vessels, review FMEAs, plan operations safely and respond correctly when failures occur. As DP spreads into offshore wind installation and maintenance, these skills are needed across a wider range of vessels and projects.
Key takeaways
You leave able to explain DP fundamentals and failure modes, apply control theory concepts, evaluate measurement systems, interpret station-keeping hydrodynamics, assess thrust allocation, power and redundancy against DP classes and support safe DP operations.
How you study
The course is delivered fully online and is self-paced, so you can fit roughly 20 hours of study around professional commitments. Lessons combine clear explanation with examples, diagrams and short interactive checks, and the main sections end with graded quizzes (6 in total) so you can confirm you can apply each method before moving on. A 145-page course book can be downloaded and printed for offline reading and later reference.
Course contents
- DP Fundamentals: What DP Is; Why DP Is Used; System Layout; History and Failures
- Control Theory: Feedback Loops; Linear Models and Laplace; Poles and Stability; Routh Criterion; PID for DP
- Measurement Systems: What Must Be Measured; Position References; Orientation and Environment; Filtering and Validation; DP Current and Faults
- Hydrodynamics: Environmental Loads; Hydrodynamic Derivatives; Ship Stability Modes; Nonlinear and Wave Effects; Station-Keeping Dynamics; Wave Feed-Forward
- Propulsion and Redundancy: Thrusters and Propulsion; Power and Allocation; Equipment Classes; FMEA and Consequence; Redundancy Exercise
- Offshore Applications: Operational Uses; Planning and Watchkeeping; People and Competence; Integrated Application Cases
- Summary: Key Takeaways
Who this course is for
This course is for engineering graduates, marine and offshore engineers, DP vessel designers, superintendents and experienced DP operators seeking a deeper technical understanding of dynamic positioning systems. A background in engineering mathematics and marine systems is helpful.
Frequently asked questions
How long does Dynamic Positioning take?
The course is designed for about 20 hours of study. It is self-paced and fully online, so you can spread it over a few weeks or complete it more quickly.
What is covered?
The course is organised into 8 sections with 37 lessons, moving from foundations to applied methods, as summarised above.
Is there material to keep after the course?
Yes. A downloadable 145-page course book accompanies the lessons for offline reading and later reference.
How is progress checked?
Each main section closes with a graded quiz (6 in total). The quizzes test understanding of the concepts and methods explained in the lessons rather than memorisation, and you can review the relevant lessons before attempting them.
Can I record this study for my own professional development?
Yes. The course notebook includes a self-assessment of the course objectives before and after study, a reflection page and a learning log, which you can use to keep your own record of professional development.
Level: Intermediate
Duration: 20 hours
Related courses: B11 – Marine Propulsors: Thrusters, Pods and Waterjets; D05 – Offshore Hydromechanics; D08 – Floating Structures; B12 – Advanced Marine Propulsion Systems
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Study at your own pace and work through the full course material, worked examples and section quizzes. Enrol in D10 – Dynamic Positioning →
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