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Marine Diesel Engines and Propulsion Systems

Marine diesel engines power the vast majority of the world's commercial fleet, from small offshore vessels to the largest ultra-large container ships. Understanding how these engines work — their thermodynamic cycles, fuel systems, cooling arrangements, turbocharging principles, and control systems — is fundamental for every engineer officer and for deck officers who must understand the engineering capabilities and limitations of their vessel. This programme covers the full spectrum of marine diesel propulsion: the thermodynamic theory of diesel combustion, the constructional differences between two-stroke crosshead engines (as used in large bulk carriers and tankers) and four-stroke trunk piston engines (as used in medium-speed propulsion and generators), fuel oil treatment and injection, cooling and lubrication systems, and the watch-keeping obligations under STCW and the ISM Code. The MarCert Marine Diesel Certificate provides documented engineering knowledge aligned with STCW Section A-III/1 officer of the watch (engineer) competencies. It is designed for engineer officers, technical superintendents, and deck officers who require a thorough understanding of propulsion engineering.

6 modules 7 lessons 50 hours 40 question exam 0 enrolled
$1,350
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Instant access on enrolment
Blockchain-verified certificate on completion
Accepted by 50+ maritime employers
70% pass mark — Professional standard
Live-proctored exam, globally accepted
25 CPE credits on passing
IMO Compliant
STCW Aligned
ISO 9001
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Our instructors are actively expanding this course with additional lessons, case studies, and practical exercises. Enrol now to access existing content and receive all new material automatically as it is published.

What You'll Learn

Explain the thermodynamic cycle of two-stroke and four-stroke marine diesel engines
Describe the construction and function of crosshead and trunk piston engine types
Trace the complete fuel oil system from bunker tanks to fuel injection
Explain the principles of turbocharging and its effect on engine performance
Identify symptoms of major engine faults and describe appropriate corrective actions
Apply MARPOL Annex VI requirements for NOx and SOx emissions to engine operation

Prerequisites

  • Basic physics knowledge (pressure, temperature, thermodynamics concepts helpful)
  • Engineering officer cadetship or relevant engineering background
  • Deck officers should have completed basic machinery familiarisation

Course Curriculum

Module 1: Module 1: Diesel Engine Theory and Combustion
2 lessons
Two-Stroke and Four-Stroke Diesel Engine Cycles 45 min
Fuel Oil Systems — Treatment, Injection, and MARPOL Compliance 45 min
Module 2: Module 2: Engine Room Systems and Watchkeeping
1 lessons
Module 3: Module 3: Fuel Systems, Fuel Treatment, and Combustion Quality
1 lessons
Module 4: Module 4: Cooling Water and Lubricating Oil Systems
1 lessons
Module 5: Module 5: Planned Maintenance System and Class Surveys
1 lessons
Module 6: Module 6: Engine Room Watchkeeping, Alarms, and Emergency Procedures
1 lessons

Who This Certification Is For

Serving officers with 2+ years at sea
Crew pursuing promotion to supervisory roles
Professionals updating lapsed certifications
Managers requiring documented competency proof

Certification Exam

40
Questions
30 min
Duration
70%
Pass Mark
Attempts

Complete all course modules before attempting the certification exam. You must achieve the pass mark to receive your certificate.