Modern ships depend on electrical power for propulsion, cargo handling, navigation, safety systems and hotel loads, and marine engineers need a sound analytical grasp of how that power is generated, converted and distributed. This practical analytical course connects electrical fundamentals to shipboard generation, conversion, distribution and propulsion. It covers electrical quantities and laws, direct-current networks and network theorems, AC waveforms, impedance and power, three-phase systems and fault calculations, transformers, motors and generators, power electronic converters, devices and PWM drives, and marine generation, distribution and electrical propulsion. Concepts are applied through practice checks, an integrated marine electrical design and calculation assessment and a final review with worked solutions, building the confidence and precision needed to work through marine electrical problems.
Course at a glance: Duration 20 hours · Self-paced online · 10 sections, 10 lessons, a 61-page downloadable course book
What you will learn
- Explain core electrical quantities and laws used in marine systems.
- Analyse direct-current circuits using standard network theorems.
- Interpret key AC relationships, including impedance, phasors and real, reactive and apparent power.
- Explain three-phase power relationships and the principles of fault calculations used onboard ships.
- Differentiate major electrical machines: transformers, motors and generators.
- Explain power electronic devices, converters and PWM drives.
- Evaluate the main elements of marine generation, distribution and electrical propulsion systems.
Inside the course: a high-level summary, section by section.
Electrical fundamentals
The course begins with the quantities and laws that underpin all electrical work: charge, current, voltage, resistance, conductance, power and energy. Coulomb’s law describes the force between charges, and resistivity explains why conductor material, length and cross-section matter for cable design. Inductance and capacitance are introduced as energy-storage elements, with inductors storing magnetic energy and capacitors electric energy, and their transient and steady-state behaviour is explained. Series and parallel combinations of components are treated systematically.
DC networks
Direct-current network analysis uses Ohm’s law and Kirchhoff’s current and voltage laws, extended by network theorems such as Thevenin and Norton equivalents. These tools allow complex circuits to be simplified and analysed with confidence, and they form the analytical foundation for battery systems, control circuits and DC distribution on board.
AC waveforms, impedance and power
Alternating current is described by amplitude, frequency, phase and RMS values. Impedance combines resistance with inductive and capacitive reactance, and phasor and complex-number methods make AC circuit analysis manageable. Real, reactive and apparent power and the power factor are explained, showing why reactive power matters for generator loading and cable sizing, and how power factor is interpreted from the real and apparent power of a load.
Three-phase power and faults
Ships almost always use three-phase power. The course explains star and delta connections, line and phase relationships, and how three-phase power is calculated. Fault calculations introduce the principles of estimating fault currents, which determine the ratings of switchgear and protective devices and are essential for safe system design. The per-unit system is introduced as a practical way to handle transformers, generators and cables at different voltage levels in a single calculation, and symmetrical short-circuit currents are explained as the starting point for checking that breakers can safely interrupt the worst credible fault. The course explains why a ship’s electrical system, with large generators close to the loads and short cable runs, can experience high fault levels relative to its size.
Transformers, motors and generators
Transformers change voltage levels between generation, distribution and consumers, and the course explains their operating principle, equivalent circuit and losses. Induction motors, the workhorses of shipboard machinery, are explained in terms of rotating magnetic fields, slip and torque characteristics. Synchronous generators supply ship power, and their voltage regulation, frequency control and parallel operation are discussed.
Power electronics
Power electronic devices, diodes, thyristors and transistors such as IGBTs, are introduced along with the converters built from them: rectifiers, inverters and DC-DC converters. Pulse-width modulation drives allow precise control of motor speed and torque, and the course explains how they work and why they have transformed marine propulsion and auxiliary systems.
Generation, distribution and propulsion
The final technical section brings everything together. Shipboard generation and distribution systems, switchboards, bus arrangements, protection and redundancy, are described, and electrical propulsion is explained, including the advantages of diesel-electric arrangements for flexibility, efficiency and redundancy. An integrated marine electrical design and calculation assessment applies the methods across the course, and a final review with worked solutions consolidates the learning.
Safety, redundancy and emergency power
Shipboard electrical systems must keep essential services running even after failures. The course explains how main and emergency switchboards, bus-tie breakers and protection coordination are arranged so that a fault in one part of the system is isolated without blacking out the whole ship, and how emergency generation supports steering, lighting, communications and other critical services. Understanding these arrangements helps engineers appreciate why system design is driven not only by normal operating loads but also by fault and emergency scenarios, and why classification and regulatory requirements place so much emphasis on redundancy and segregation.
From components to systems
A recurring theme is the link between component behaviour and system performance. Cable resistance and reactance affect voltage drop across the ship; motor starting currents and power factor affect generator loading; converter switching introduces harmonics that must be managed; and fault levels determine switchgear ratings and protection settings. By working through calculations at each level, learners develop the ability to reason from individual components to the behaviour of the whole power system, which is the key skill in shipboard electrical design and fault finding. The integrated assessment at the end of the course is built around this idea, asking learners to carry a set of related calculations through a realistic marine system so that each result feeds the next, as it would in a real design or troubleshooting task. The worked solutions and final review then allow learners to check their reasoning step by step and identify any areas that need further practice before applying the methods at work.
Why this matters in practice
Electrical systems are central to modern ships, from conventional vessels to ships using electric propulsion. Marine engineers and electro-technical officers who understand circuit analysis, AC and three-phase power, machines and power electronics can operate systems safely, diagnose faults and contribute to design and retrofit projects. A firm grasp of the fundamentals also makes it far easier to engage with specialist topics such as power system protection, propulsion drives and system integration later in a career.
Key takeaways
You leave able to apply electrical laws, analyse DC and AC circuits, work with three-phase power and fault principles, explain transformers, motors and generators, describe power electronic converters and PWM drives and evaluate marine generation, distribution and propulsion systems.
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 (7 in total) so you can confirm you can apply each method before moving on. A 61-page course book can be downloaded and printed for offline reading and later reference.
Course contents
- Electrical Fundamentals: Charge, Circuits and Energy Storage
- DC Circuit Analysis: DC Networks and Worked Calculations
- AC Theory: AC Waveforms, Impedance and Power
- Three-Phase Systems: Three-Phase Power and Fault Calculations
- Electrical Machines: Transformers, Motors and Generators
- Power Electronics: Converters, Devices and PWM Drives
- Marine Electrical Propulsion: Generation, Distribution and Propulsion
- Integrated Assessment: Marine Electrical Design and Calculation Assessment
Who this course is for
This course is for engineering graduates, marine engineers, electro-technical officers, naval architects and technical staff who need a solid analytical grounding in shipboard electrical systems. Learners should already be comfortable with algebra, elementary trigonometry, complex numbers and basic mechanics.
Frequently asked questions
How long does Marine Electrical & Electronic Systems 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 10 sections with 10 lessons, moving from foundations to applied methods, as summarised above.
Is there material to keep after the course?
Yes. A downloadable 61-page course book accompanies the lessons for offline reading and later reference.
How is progress checked?
Each main section closes with a graded quiz (7 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.
Duration: 20 hours
Related courses: J02 – IFEP System Design for a Dual-Role Tanker; B07 – Propeller-Engine Matching & Ship Resistance; B06 – Resistance & Propulsion; D10 – Dynamic Positioning
Enrol
Study at your own pace and work through the full course material, worked examples and section quizzes. Enrol in J01 – Marine Electrical & Electronic Systems →
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