- What S-CAT Training Actually Covers
- The 5-Day Course: Format and Delivery
- Written Exam Format and Mechanics
- All 8 Exam Domains Explained
- Where the Exam Score Lives: High-Weight Domains
- Prerequisites and Eligibility Requirements
- Registration, Fees, and Renewal
- A Domain-Driven Study Schedule
- Who Hires S-CAT Certified Technicians
- Frequently Asked Questions
- S-CAT training is a 5-day in-person AMPP course worth 3.4 CEUs/PDHs that includes both classroom instruction and a practical exam.
- The written exam has 50 questions in 90 minutes (computer-based at Pearson), with results reported as Pass or Fail.
- Domain 4 (Corrosion Protection System) carries the most exam weight at 22-26%; Visual Assessments is second at 18-22%.
- Certification requires 1.5 years of applicable work experience in addition to completing the course and both exams.
What S-CAT Training Actually Covers
The S-CAT Certification - Shipboard Corrosion Assessment Technician - is a professional credential issued by the Association for Materials Protection and Performance (AMPP). The training program behind it is not an online self-study course or a weekend seminar. It is a structured, 5-day in-person program that combines expert instruction, hands-on practical assessment, and a computer-based written examination. If you are preparing for this credential, understanding the training format first will shape every other decision you make about how to prepare.
The course is taught in English and awards 3.4 Continuing Education Units (CEUs) or Professional Development Hours (PDHs) upon completion. Those PDH credits matter beyond just the course itself - renewal of the certification requires 8 PDHs per year, totaling 24 PDHs over the 3-year certification cycle. So the course also jumpstarts your renewal clock.
For a fuller breakdown of what the credential means in a career context, see What Is S-CAT Certification? If you want to understand the terminology and acronym before diving into the training structure, What Is S-CAT? provides a solid foundation.
The 5-Day Course: Format and Delivery
The S-CAT course is delivered over five consecutive days by AMPP. The course fee includes expert-led instruction, all required course materials, and - when applicable - access to the related certification exam. This bundled approach means you are not paying separately for a study manual and then a separate exam registration fee; the course package is designed as an end-to-end preparation and assessment pathway.
The training covers all eight knowledge domains that appear on the written exam, with instruction weighted toward the higher-stakes content areas. Expect significant classroom time dedicated to coating systems, visual inspection protocols, tank inspection procedures, and corrosion scoring methodologies - because those domains carry the most exam weight and represent the core job tasks of a practicing S-CAT technician.
The practical exam is administered as part of the course itself. This is a hands-on assessment of your ability to apply inspection and assessment techniques in a controlled setting. Successful completion of the practical exam is one of the official certification requirements, separate from passing the written exam.
What the Practical Exam Tests
While AMPP does not publish a granular practical exam rubric publicly, the practical component aligns with the course's field-applicable content: identifying corrosion types visually, applying evaluation tools correctly, assessing coating conditions, and demonstrating proper tank inspection techniques. These are not abstract skills - they map directly to the job tasks S-CAT technicians perform on naval and commercial vessels.
Written Exam Format and Mechanics
After completing the course and practical exam, candidates sit for the S-CAT Technician Written Exam, administered as a computer-based test (CBT) through Pearson testing centers. This is a separate step from the in-person course component. Here is exactly what to expect:
| Exam Detail | Specifics |
|---|---|
| Number of Questions | 50 |
| Total Seat Time | 90 minutes |
| NDA/Tutorial Time | 4 min (NDA) + 6 min (tutorial) = 10 min |
| Active Testing Time | Approximately 80 minutes for 50 questions |
| Question Format | Multiple-choice; some select-all-that-apply |
| Delivery | Computer-based at Pearson test centers |
| Result Reporting | Pass or Fail |
| Exam Code | NACE-SCAT-001 |
| Prep Guide Version | March 2026 |
The select-all-that-apply questions deserve special attention. Unlike standard multiple-choice items where one answer is correct, these questions require you to identify every correct response - partial credit is not typically awarded on certification exams. Mastering this question style requires a deeper understanding of the subject matter, not just pattern recognition. Practicing with S-CAT practice tests that replicate this format is one of the most efficient ways to build that skill before exam day.
After completing the CBT, candidates can view domain-strength feedback in their AMPP profile. This is valuable data: if you need to retake the exam, you will know exactly which of the eight domains cost you points.
All 8 Exam Domains Explained
The S-CAT Written Exam is organized around eight content domains. Understanding each domain - and how much weight it carries - is the foundation of effective preparation. For a deep dive into every content area, see the S-CAT Exam Domains 2026: Complete Guide to All 8 Content Areas.
Domain 1: Visual Assessments (18-22%)
The second-heaviest domain on the exam. Candidates must recognize and categorize corrosion types, coating failure modes, and surface condition indicators through visual inspection alone.
- Identifying rust grades, blistering, and delamination visually
- Applying standardized photographic reference scales
- Distinguishing active corrosion from staining or residue
Domain 2: Corrosion Control Methods (4-8%)
A lower-weight domain covering the methods used to mitigate corrosion on shipboard structures. Understand the principles behind each method, not just names.
- Cathodic protection principles
- Coatings as primary corrosion barriers
- Inhibitors and environmental controls
Domain 3: Evaluation Tools and Equipment (4-8%)
Candidates must know the correct tool for each measurement task and understand instrument limitations and calibration requirements.
- Dry film thickness gauges and their correct application
- Holiday detectors and adhesion test equipment
- Environmental measurement tools (dewpoint, humidity)
Domain 4: Corrosion Protection System (22-26%)
The highest-weight domain. Covers coating specifications, system selection, surface preparation standards, and application requirements aboard vessels.
- Coating system components: primers, intermediates, topcoats
- Surface preparation grades (e.g., SSPC/NACE standards)
- Coating specification interpretation and compliance
Domain 5: Maintenance and Manage Inspection Results (16-20%)
Covers documentation, reporting, and the management of inspection findings to support vessel maintenance planning.
- Inspection report writing and record-keeping
- Prioritizing repair vs. maintenance decisions
- Communication of findings to stakeholders
Domain 6: Tank Inspection (10-14%)
Focused on the procedures, safety requirements, and technical considerations specific to inspecting ballast tanks, void spaces, and other confined spaces on ships.
- Confined space entry requirements and safety
- Inspection sequencing within tank structures
- Structural component identification within tanks
Domain 7: Total Tank Scoring (4-8%)
Candidates must understand the scoring methodology used to quantify and summarize tank condition based on inspection findings.
- Point-based scoring systems for coating condition
- Aggregating section scores into a total tank score
- Interpreting scores within maintenance decision frameworks
Domain 8: General Knowledge (6-10%)
Foundational corrosion science and maritime context. Recommended background in basic science and chemistry pays dividends here.
- Electrochemical basis of corrosion
- Types of corrosion (galvanic, crevice, pitting)
- Basic ship structure and terminology
Where the Exam Score Lives: High-Weight Domains
The score distribution on the S-CAT Written Exam is not uniform. Two domains together account for roughly 40-48% of the entire exam:
- Domain 4: Corrosion Protection System - 22-26%
- Domain 1: Visual Assessments - 18-22%
Add Domain 5 (Maintenance and Manage Inspection Results, 16-20%) and you have three domains that could represent more than half of your total score. This is not a reason to ignore the lower-weight domains - a pass/fail exam requires consistent performance across all content - but it does mean your study time should not be evenly distributed across all eight areas.
For detailed study strategies tied to each domain, the S-CAT Study Guide 2026: How to Pass on Your First Attempt provides a structured breakdown. If you want to understand what makes this exam challenging before you start, How Hard Is the S-CAT Exam? Complete Difficulty Guide 2026 is worth reading early in your preparation.
Prerequisites and Eligibility Requirements
The S-CAT course page lists no required course prerequisites - you do not need to hold another AMPP certification before enrolling. However, achieving the full S-CAT certification (not just course completion) requires meeting several criteria simultaneously:
- 1.5 years of applicable work experience in shipboard corrosion assessment or a closely related field
- Completion of Shipboard Corrosion Assessment Training (the 5-day AMPP course)
- Successful completion of Ethics for the Corrosion Professional or equivalent training approved by AMPP
- Pass the practical exam administered during the course
- Pass the written exam (NACE-SCAT-001) at a Pearson CBT center
- Acceptance of AMPP Terms of Service
AMPP recommends a background in basic science and chemistry, which is sound advice - Domain 8 (General Knowledge) tests electrochemical corrosion principles, and understanding the chemistry behind coating adhesion and cathodic protection makes the higher-weight domains more intuitive.
Registration, Fees, and Renewal
The current initial course and exam fee is not publicly displayed on AMPP's public course listing page. AMPP does state that course purchases include expert-led instruction, materials, and when applicable access to the related certification exam. Candidates should contact AMPP directly for current pricing before budgeting for enrollment. For a full analysis of the cost structure, see S-CAT Certification Cost 2026: Complete Pricing Breakdown.
Renewal fees are publicly stated:
| Renewal Fee Type | Cost |
|---|---|
| AMPP Member Renewal | $295 |
| Non-Member Renewal | $525 |
Certification is valid for 3 years. Renewal requires recertification application approval, documentation of 1.5 years of applicable work experience during the certification period, and 8 PDHs per year totaling 24 PDHs over three years. The 3.4 PDHs from the initial course count toward your first year but do not fulfill the entire 3-year requirement.
A Domain-Driven Study Schedule
Because the S-CAT course is immersive and 5 days long, pre-course preparation is where most candidates gain or lose their edge. The following schedule assumes 3-4 weeks of preparation before attending the course, with post-course review before the Pearson CBT.
Domain 4 - Corrosion Protection System (22-26%)
- Study coating system components: primers, intermediates, topcoats, and their roles
- Learn SSPC/NACE surface preparation grades and what each requires
- Practice interpreting coating specification documents
- Complete Domain 4 practice questions on the S-CAT practice test platform
Domain 1 + Domain 5 - Visual Assessments (18-22%) and Inspection Management (16-20%)
- Study standardized rust grade scales and coating failure mode classification
- Review inspection documentation formats and reporting requirements
- Practice distinguishing corrosion types from photographic references
- Study Domain 5 maintenance decision frameworks
Domains 6, 8, 2, 3, 7 - Remaining Content Areas
- Tank inspection safety and entry procedures (Domain 6)
- Electrochemical corrosion principles and ship structure (Domain 8)
- Evaluation tools, cathodic protection, and tank scoring methods (Domains 2, 3, 7)
- Use spaced repetition for lower-weight content you find harder to retain
CBT Readiness - Full Exam Simulation
- Run timed 50-question practice exams simulating Pearson CBT conditions
- Focus extra review on any domain where you score below your target threshold
- Practice select-all-that-apply questions specifically - these require full mastery, not partial knowledge
Who Hires S-CAT Certified Technicians
S-CAT certification is specifically designed for professionals who inspect and assess corrosion on ships and maritime vessels. The credential is recognized by naval and commercial maritime organizations that require documented, standardized inspection competency. Primary employers include the U.S. Navy and its contractor ecosystem, commercial shipyards, vessel classification societies, marine coating inspection firms, and maritime maintenance contractors.
The certification signals that a technician can execute the full inspection workflow: visually assess coating and corrosion conditions, apply evaluation tools correctly, score tank conditions using a standardized methodology, document findings in inspection reports, and recommend maintenance actions. These are job-critical skills in environments where undetected corrosion has serious structural and safety consequences.
For a look at career paths and what employers are actively seeking, S-CAT Jobs covers the current employment landscape. If you are weighing whether the credential is worth the time and cost investment, Is the S-CAT Certification Worth It? Complete ROI Analysis 2026 provides a structured analysis.
Key Takeaway
The S-CAT credential is purpose-built for shipboard work. It is not a general corrosion certification repurposed for maritime contexts - the exam domains, the practical component, and the training structure are all designed around the specific tasks performed during vessel inspections. Candidates with hands-on field experience in coatings or marine inspection will have a meaningful advantage going into both the course and the written exam.
Frequently Asked Questions
The S-CAT course is a 5-day in-person program delivered in English by AMPP. It includes expert-led instruction, course materials, a practical exam, and when applicable access to the written certification exam. Course locations vary; candidates should check AMPP's schedule for upcoming sessions.
No required course prerequisites are listed on the S-CAT course page. However, full certification requires 1.5 years of applicable work experience, completion of Ethics for the Corrosion Professional training, and passing both the practical and written exams. A background in basic science or chemistry is recommended by AMPP.
The written exam is a 50-question computer-based test administered at Pearson testing centers. Total seat time is 90 minutes, which includes 4 minutes for the nondisclosure agreement and 6 minutes for the system tutorial. Questions are primarily multiple-choice with some select-all-that-apply items. Results are reported as Pass or Fail.
Domain 4 (Corrosion Protection System) carries the highest exam weight at 22-26% and should be your first priority. Domain 1 (Visual Assessments) at 18-22% is second. Together with Domain 5 (Maintenance and Manage Inspection Results at 16-20%), these three domains represent the majority of the exam's content weight.
Renewal costs $295 for AMPP members and $525 for nonmembers. Certification is valid for 3 years. Renewal requires recertification application approval, documentation of 1.5 years of applicable work experience, and 24 total PDHs earned at a rate of 8 PDHs per year over the 3-year cycle.