ABYC Marine Systems vs ABYC A/C Refrigeration: which ABYC certification fits your work?
Marine Systems touches A-6 refrigeration and air conditioning as one standard among more than 20. A/C Refrigeration is the specialist exam: the refrigeration cycle, components, AC and DC controls, seawater cooling loops, ducting and air flow, reverse-cycle troubleshooting and EPA refrigerant rules, in 176 questions with a cut score of 84.1%. A/C Refrigeration is offered as self-study only.
ABYC Marine Systems vs ABYC A/C Refrigeration at a glance
| ABYC Marine Systems | ABYC A/C Refrigeration | |
|---|---|---|
| Full name | ABYC Marine Systems Certification Exam | ABYC A/C Refrigeration Certification Exam |
| Questions | 213 multiple-choice questions | 176 multiple-choice questions |
| Time | 3.5 hours | 3.5 hours |
| Passing score | 83.1% (ABYC's published cut score) | 84.1% (ABYC's published cut score) |
| Format | Proctored, computer-based multiple choice; reference-material rules are not stated on the public exam pages, so confirm them when you book | Proctored, computer-based multiple choice; reference-material rules are not stated on the public exam pages, so confirm them when you book |
| Cost | Exam only: US$295 for ABYC members, US$595 for nonmembers, per attempt (2026). Study guide US$85 member / US$175 nonmember. Class fees vary; check ABYC's class calendar | Exam only: US$295 for ABYC members, US$595 for nonmembers, per attempt (2026). ABYC lists study guides at US$85 member / US$175 nonmember; confirm one is offered for this certification. ABYC offers this certification in self-study format only |
| Languages | English | English |
| Where | Online with a remote proctor (webcam, microphone, Chrome, government ID, single monitor), or at the end of an ABYC certification class | Self-study only: online with a remote proctor (webcam, microphone, Chrome, government ID, single monitor) |
| Level | ABYC Certification | ABYC Certification |
What each exam covers
ABYC Marine Systems
- Gasoline and Diesel Fuel Systems
- Ventilation, LPG and Carbon Monoxide
- Water, Sanitation and Bilge Systems
- Thru-Hulls, Seacocks and Exhaust
- Electrical Basics for Systems Technicians
- Steering and Engine Controls
- Fire Protection, A/C and Refrigeration
ABYC A/C Refrigeration
- Refrigeration Principles
- Components and System Design
- Electrical Systems and Controls
- Seawater Cooling Systems
- Air Flow, Ducting and Condensate
- Reverse-Cycle Operation and Troubleshooting
- Refrigerant Handling and EPA Rules
Which should you take?
Marine Systems touches A-6 refrigeration and air conditioning as one standard among more than 20. A/C Refrigeration is the specialist exam: the refrigeration cycle, components, AC and DC controls, seawater cooling loops, ducting and air flow, reverse-cycle troubleshooting and EPA refrigerant rules, in 176 questions with a cut score of 84.1%. A/C Refrigeration is offered as self-study only.
Try both, free
Each free practice test takes about 10 minutes and shows your score by topic. No signup.
FAQ
What is the difference between ABYC Marine Systems and ABYC A/C Refrigeration?
Marine Systems touches A-6 refrigeration and air conditioning as one standard among more than 20. A/C Refrigeration is the specialist exam: the refrigeration cycle, components, AC and DC controls, seawater cooling loops, ducting and air flow, reverse-cycle troubleshooting and EPA refrigerant rules, in 176 questions with a cut score of 84.1%. A/C Refrigeration is offered as self-study only.
Which is harder, ABYC Marine Systems or ABYC A/C Refrigeration?
ABYC Marine Systems: 213 multiple-choice questions in 3.5 hours. ABYC A/C Refrigeration: 176 multiple-choice questions in 3.5 hours. The longer exam covers more ground, but the harder one is the one further from your daily work. Take both free practice tests to see where you stand.
Can I hold both ABYC Marine Systems and ABYC A/C Refrigeration?
Yes. Each ABYC certification is separate, and many technicians hold several. Three or more qualify you for Master Technician or Master Advisor status (Service Management and USCG Recreational Boat Regulations don't count toward it).
How do I prepare for ABYC Marine Systems and ABYC A/C Refrigeration?
Start with the free practice test for each, then study by topic. Premium is per exam ($147 a month each), so most people start with the exam they'll sit first and add the second when they're ready.
More comparisons
- ABYC Marine Electrical vs ABYC Marine Systems
- ABYC Marine Systems vs ABYC Engines & Fuel Systems
- ABYC Marine Standards vs ABYC Marine Systems
Exam details are summarized from ABYC's published information as of November 2026. Confirm with ABYC before you book. ABYCExamPrep is not affiliated with the American Boat & Yacht Council.