In the sophisticated and technically demanding world of modern seafaring, particularly within the superyacht and commercial vessel sectors, the engine room is the beating heart of the operation. Behind every seamless voyage and every luxury experience is a team of highly skilled marine engineers, the unsung heroes who ensure the vessel operates safely, efficiently, and reliably. For anyone aspiring to join these essential ranks, the journey begins with a non-negotiable foundation: the Maritime and Coastguard Agency (MCA) Approved Engine Courses.
This guide serves as your definitive resource for understanding these critical qualifications. We will delve into the specifics of the Approved Engine Course 1 (AEC1) and its advanced successor, the Approved Engine Course 2 (AEC2). We will explore what each course entails, who they are designed for, and most importantly, the exciting and lucrative career pathways they unlock. Join us as we navigate the path to becoming a qualified marine engineer and discover why Palma Sea School is the premier institution to power your career forward.
Understanding the Approved Engine Course (AEC): Your Gateway to the Engine Room
Before diving into the specifics of each course, it is crucial to understand the context and authority of the AEC qualification. These courses are not merely introductory workshops; they are formally structured programmes designed to meet the stringent Certificate of Competency (CoC) requirements set by the MCA for the “Small Vessel” (SV) engineering route.
The MCA defines the Small Vessel category with precision, encompassing a vast and diverse fleet of vessels that are less than 3000 Gross Tonnes (GT) and have a propulsive power of less than 9,000 kW. While many immediately associate this with the glamorous world of superyachts, the qualification’s reach is far broader. An AEC certificate is a passport to a career across multiple maritime sectors, including Tugs, Fishing Vessels, Workboats, Standby Vessels, Seismic Survey ships, Oceanographic Research Vessels, and Government Patrol Vessels.
This inherent transferability makes the AEC a remarkably robust and valuable credential. It provides holders with significant career flexibility and resilience, ensuring their skills are in demand across the entire small vessel industry, not just a single niche. It is more than a “yachting ticket”; it is the key that unlocks the door to a wide-ranging professional maritime engineering career.
Laying the Foundation: A Deep Dive into the MCA Approved Engine Course 1 (AEC1)
What is the AEC1?
The MCA Approved Engine Course 1 (AEC1) is an intensive, five-day programme, typically comprising 30 to 35 hours of instruction. Its core objective is to provide students with the foundational theoretical knowledge and, crucially, the practical hands-on experience of marine diesel engines and their associated systems.
The course is meticulously designed to elevate a student from an ‘entry-level’ understanding to a point where they can confidently manage, service, and troubleshoot a diesel engine on a maritime vessel. This is achieved through a proven blend of engaging classroom theory and extensive practical sessions in a dedicated workshop environment.
Who Should Take the AEC1?
The AEC1 is the essential first step for a wide array of individuals. Its primary audience is those who wish to embark on a professional marine engineering career but do not hold formal qualifications. Qualifying experience for all higher engineering qualifications is only recognised if a person holds an AEC, so career progression is impossible without it.
However, its value extends far beyond aspiring engineers. The course is an invaluable addition to the skillset of any deck crew member, including Deckhands, Mates, and even Captains. Holding an AEC1 certificate makes them significantly more versatile, enhancing their job prospects and qualifying them for highly sought-after dual deck/engineer roles. Furthermore, the course is immensely beneficial for private boat owners and skippers who want to gain the knowledge and self-sufficiency to maintain their own vessels, preventing minor issues from becoming voyage-ending emergencies. The only prerequisite for enrolment is a minimum age of 18 years; no prior engineering experience is necessary.
“Had an amazing experience at Palma Sea School! A huge thank you to our fantastic instructor — knowledgeable, clear, and supportive throughout… Highly recommend the school 100%. Great team, great people, and an unforgettable experience!”
— Julien Robert Blondeau Antunes
What Will You Learn? The AEC1 Syllabus Explained
The AEC1 syllabus is comprehensive, covering every fundamental system of a marine diesel engine and the safety protocols that govern its operation. The curriculum provides a holistic understanding, ensuring graduates are not just mechanics, but well-rounded marine professionals. The table below outlines the core modules covered.
| Module | Key Learning Objectives & Concepts Covered |
| 1. The Compression Ignition Engine | Principles of 2-stroke vs. 4-stroke cycles; engine construction and identification of main components; key terminology such as Top Dead Centre (TDC), Bottom Dead Centre (BDC), swept volume, and compression ratio; interpretation of engine performance data. |
| 2. The Fuel System | Properties of diesel fuels; detailed breakdown of system components including tanks, pre-filters, water separators, lift pumps, injector pumps, and injectors; the importance of fuel cleanliness and procedures for bleeding the system. |
| 3. The Air System (Aspiration) | Understanding the critical role of air in the combustion process; air-to-fuel ratios; maintenance of filters; principles of naturally aspirated, turbocharged, and supercharged systems; function of intercoolers, aftercoolers, and exhaust components. |
| 4. The Cooling System | Principles of heat exchange and managing combustion temperatures; detailed study of raw and freshwater cooling circuits; function and maintenance of components like pumps, thermostats, and heat exchangers; correct winterisation procedures. |
| 5. The Lubrication System | The fundamental function of lubricating oil in reducing friction and dissipating heat; tracing the path of oil through an engine; understanding different types of pumps (gear, lobe) and filters; function of pressure relief valves. |
| 6. The Electrical System | Characteristics of lead-acid and alkaline batteries; function of alternators and drive systems; principles of battery charging and split-charging arrangements; reading basic circuit diagrams and understanding engine instrumentation and safety features. |
| 7. Power Transmission | Operation of reduction and reverse gearboxes, clutches, and control systems; understanding propeller shafting, couplings, and the critical importance of alignment; function of stern tube bearings and sealing arrangements. |
| 8. Hull Fittings & Safety | Procedures for the maintenance and annual inspection of seacocks and shipside valves; principles of corrosion and cathodic protection systems; overview of MARPOL pollution legislation; application of the Code of Safe Working Practices; safety protocols for bottled LPG installations. |
Advancing Your Skills: Mastering the MCA Approved Engine Course 2 (AEC2)
What is the AEC2?
The MCA Approved Engine Course 2 (AEC2) is the essential second stage in the Small Vessel engineering pathway. This five-day, 35-hour course is not a standalone qualification; it is an enhanced continuation that builds directly upon the foundational knowledge acquired in AEC1. It is a mandatory module for any candidate wishing to progress to the Small Vessel Second Engineer Officer qualification and beyond. The course structure maintains the effective 50/50 balance between classroom theory and hands-on practical training, ensuring that advanced concepts are thoroughly understood and can be applied in a real-world engine room environment.
Who Needs the AEC2?
This course is specifically designed for individuals who hold an AEC1 certificate and are committed to pursuing a professional career in marine engineering. It is the gateway to higher Certificates of Competency (CoC) and is aimed squarely at those looking to secure roles as junior or assistant engineers, providing a direct and clearly defined route to a Second Engineer position on a wide range of small vessels.
Expanding Your Expertise: The AEC2 Syllabus in Detail
Where AEC1 focuses on the prime mover—the diesel engine—AEC2 broadens the scope to encompass the crucial auxiliary systems and management responsibilities that are vital for the safe and efficient operation of the entire vessel. The syllabus represents a significant step up in complexity and responsibility, preparing candidates for more senior roles.
| Module | Key Learning Objectives & Concepts Covered |
| 1. Refrigeration Systems | A thorough understanding of the compression refrigeration cycle and the function of its key components (compressor, condenser, evaporator, expansion valve); practical skills in basic fault finding, identifying common system faults, and initiating corrective actions. |
| 2. Legislation & Management | In-depth knowledge of MARPOL Annexes I, IV, V, and VI concerning pollution prevention; practical application of the Code of Safe Working Practices (COSWAP); correct procedures for maintaining the Engine Log Book, Oil Record Book, and records of consumables. |
| 3. On-Board Maintenance Systems | Principles of modern maintenance management, including planned maintenance schedules and condition-based monitoring; understanding techniques such as lubricating oil analysis, vibration analysis, thermographic surveys, and endoscope inspections. |
| 4. Safe Systems of Work | How to conduct machinery-related risk assessments and interpret Material Safety Data Sheets (MSDS); understanding and implementing ‘Permit to Work’ systems; procedures for safe entry into enclosed spaces, including the practical use of oxygen and gas detectors. |
| 5. Lifting & Slinging Operations | Application of safe manual lifting techniques; understanding the inspection requirements and record-keeping for lifting equipment (LOLER); demonstrating the safe and practical use of lifting equipment to transport a heavy object (e.g., 50 kg). |
| 6. Electrical Distribution Systems | Understanding the layout of shipboard electrical distribution systems; knowledge of protection devices and safety features; correct use of Personal Protective Equipment (PPE) when working on electrical systems; practical use of insulation and continuity testers. |
| 7. Basic Hydraulic Systems | Reading and understanding basic shipboard hydraulic circuit diagrams and symbols; performing routine maintenance tasks such as filter cleaning; basic fault finding and rectification within hydraulic systems. |
| 8. Auxiliary Systems | Management of potable fresh water systems, including generation, storage, treatment, and testing in compliance with regulations (e.g., MGN 565); operation of sewage treatment plants to comply with MARPOL Annex IV; awareness of associated hazards like H2S and Ammonia gases. |
Charting Your Course: Career Prospects and Progression with AEC Qualifications
Completing your AEC1 and AEC2 is not the end of your training; it is the beginning of a structured, rewarding, and well-compensated career. These certificates are the foundational building blocks upon which all further Small Vessel engineering qualifications are built.
The Small Vessel Engineer Career Pathway
The MCA has established a clear progression route for engineers in the small vessel sector, and the AEC is the mandatory entry point. Without it, you cannot accumulate the required sea service to advance. The pathway is as follows:
- AEC 1 & 2 Certificates: This is the essential starting block, qualifying you for entry-level engineering roles.
- Marine Engine Operator Licence (MEOL): Holding both AEC1 and AEC2 certificates can contribute towards the award of an MEOL. This license is required for individuals serving as Chief Engineer on UK-flagged vessels of less than 750 kW operating in near-coastal waters.
- Small Vessel (SV) Chief Engineer Certificates of Competency: This is the main career ladder. To progress to the senior ranks—formerly known as the “Y-Tickets” (Y4, Y3, Y2, Y1) and now updated to their SV equivalents—an engineer must gain a specified amount of sea service. Critically, this sea service only counts after the AEC has been obtained. The AEC is, therefore, the key that starts the engine of your career progression.
Job Roles and Earning Potential
Holding an AEC certificate immediately qualifies you for a range of positions, including Junior Engineer, OOW Engineer (AEC), and the increasingly common dual-role Deck/Engineer. The qualification is widely regarded as the “base-minimum” for any engineer working on yachts over 24 metres in length.
This qualification acts as a significant salary multiplier. While an entry-level Deckhand can expect to earn a respectable salary, their career and salary progression is often less defined. By investing in the AEC, a crew member unlocks the engineering career ladder, which has a much steeper and more structured trajectory for advancement and remuneration. For a Deckhand, obtaining an AEC is a direct investment in their future earning potential, making them a more valuable asset to any crew and opening up higher-paying opportunities. The following table provides an at-a-glance visualisation of the financial rewards as you progress up the engineering ladder.
| Role | Vessel Size | Indicative Monthly Salary (€) | Typical Minimum Qualification |
| Junior / OOW Engineer | 50m – 100m+ | €3,000 – €4,500 | AEC 1 & 2, STCW |
| Third Engineer | 70m – 100m+ | €4,000 – €5,500 | AEC / EOOW |
| Second Engineer | 40m – 70m+ | €4,500 – €7,000+ | AEC / Y3 / SV Chief 3000kW |
| Sole / Chief Engineer | 30m – 50m | €5,000 – €8,000+ | AEC / Y3 / SV Chief 3000kW |
| Chief Engineer | 50m+ | €7,000 – €20,000+ | Y2 / Y1 / SV Chief 9000kW |
(Note: Data synthesised from industry salary guides)
Why Train at Palma Sea School? Your Premier Choice in the Heart of the Mediterranean
Choosing where to gain your qualifications is as important as the qualifications themselves. Your training provider should offer not just certification, but expertise, support, and a genuine pathway into the industry. Palma Sea School excels on all fronts.
Unmatched Expertise and a Reputation for Excellence
Palma Sea School is the leading and longest-established RYA and MCA training centre in Palma de Mallorca. This longevity is a testament to our consistent delivery of high-quality training. But you don’t have to take our word for it. Our reputation is solidified by the overwhelming positive feedback from the crew who have trained with us, reflected in over 600 five-star Google reviews from professionals worldwide.
“Outstanding tuition. I completed AEC1/2 with the school and had a very professional and fulfilling service. All staff are very knowledgeable, personable and kind. Definitely going back for any future tuition. Thanks again!”
— Vinny
Learning from the Best: Our World-Class Instructors
A course is only as good as its instructor. At Palma Sea School, our engineering courses are led by highly experienced marine engineers who bring a wealth of real-world knowledge from years at sea into the classroom. Our students consistently praise them for being knowledgeable, patient, and exceptionally supportive, creating a learning environment where questions are encouraged and confidence is built.
State-of-the-Art Facilities in a Prime Location
Our school is conveniently located on Palma’s main Paseo Marítimo, placing you in the epicentre of the Mediterranean superyacht industry. This location is a strategic career advantage. Training in Palma means you are learning where the jobs are, surrounded by the marinas, shipyards, and crew agencies that define the industry. This “Palma ecosystem” provides unparalleled networking opportunities and an immersive professional culture from day one. Our modern, bright classrooms and dedicated, fully-equipped engineering workshops provide the perfect environment for both theoretical and practical learning.
Flexible Training Options: Palma or the UK
We understand that our students come from all over the world. For those who are based in or prefer to train in the United Kingdom, we offer an equally outstanding option. Palma Sea School’s sister company, South West Maritime Academy, delivers the same high-quality, MCA-approved AEC1 and AEC2 courses.
Based at a unique, purpose-built training facility in Cromhall, South Gloucestershire, South West Maritime Academy upholds the same exacting standards of instruction and practical training. Their own stellar reviews praise their experienced instructors and excellent facilities, ensuring you receive the same calibre of education whether you choose the sunny shores of Mallorca or the heart of the UK.
Your Next Steps: Enrolling in Your AEC Course
Embarking on your marine engineering career is a significant and exciting step. The MCA Approved Engine Courses are your gateway to this dynamic industry, and Palma Sea School is your ideal partner for the journey.
For those serious about fast-tracking their career, we highly recommend the AEC1 & 2 Combined 2 Week Package. This is the most efficient and cost-effective way to gain both foundational and advanced qualifications, setting you on a direct path to success.
Are you ready to power your future? Explore our course dates, get in touch with our expert team, and enrol today. Your career in the engine room awaits.
References
International Maritime Organization (IMO). The International Convention for the Prevention of Pollution from Ships (MARPOL).
Maritime and Coastguard Agency (MCA), 2017. MSN 1859 (M) Amendment 1: UK Requirements for Small Vessel Engineer Officers.
Maritime and Coastguard Agency (MCA). The Code of Safe Working Practices for Merchant Seafarers (COSWAP).