Covers the principal topics in electrotechnology for Marine Engineering Certificates of Competency (CoC) as well as the core syllabi for undergraduates studying for BSc, BEng and MEng degrees in marine engineering and electrical engineering. This book provides a comprehensive coverage of the basic theoretical work required by marine engineering officers and electro technical officers (ETOs), putting into place key fundamental building blocks and topics in electrotechnology before progressing to more complex topics and electromagnetic systems. The new edition will provide worked examples and test exam questions, corresponding to current Merchant Navy Qualifications. Other revisions will include new material on emergent technology such as image intensifiers (photoelectric effect, secondary emission), the increased maritime use if LEDs, examples of ship systems, including power distribution systems, and references to modern ship systems, eg. GPS, ECDIS, Radar, AIS, Comms outfits, etc.