USCG-AE-LTD Pass Rate 2026: What the Data Shows

Why There Is No Single Published Pass Rate

Candidates searching for the pass rate of the National Assistant Engineer (Limited) Steam/Motor/GT credential usually want one clean figure: "X percent of people pass." That figure does not exist in any verified, official form that we can point to. Being honest about this is more useful than inventing a number, because a fabricated statistic can mislead you into either overconfidence or unnecessary anxiety.

There are structural reasons why a tidy pass rate is hard to come by for this credential:

• Modular examination. The credential draws on U.S. Coast Guard National Maritime Center (NMC) marine engineering examination modules rather than a single, branded, one-sitting test. Results are tied to individual module attempts, not to one headline score.
• Government administration. The NMC is a regulatory body that issues mariner credentials. Its publications focus on regulatory requirements and credential issuance, not on marketing-style pass-rate statistics for each endorsement.
• Small, specialized candidate pool. A limited engineer endorsement serves a narrow slice of the maritime workforce, so aggregate figures, where they exist at all, can swing widely and mean little for any one individual.
• Varied preparation paths. Candidates arrive through different routes, such as sea service, approved training, or combinations of both, which makes any blended percentage hard to interpret.

If you want a sense of difficulty rather than a statistic, our companion article on how hard the USCG-AE-LTD exam is walks through what the content actually demands.

What Data Actually Exists for This Credential

While a headline pass rate is not verified, there are real, usable pieces of information. Understanding what is known and what is not helps you plan with confidence instead of guessing.

The practical takeaway is that your planning should rest on the verified items: the governing body, the module-based structure, and the content area. For the specifics you cannot confirm here, such as current fees or scheduling mechanics, go to the NMC directly and compare against our guides on certification cost and exam dates and scheduling.

How the Credential Is Tested Through NMC Modules

Rather than thinking of a single exam with a single pass mark, think of this credential as a body of marine engineering knowledge that the Coast Guard evaluates through its examination modules. The framework is regulatory, which means two things for you: the content is standardized, and the expectations are tied to what a licensed engineer on a vessel must actually know to operate safely.

Our site organizes this credential around one domain, Marine Engineering Knowledge and Skills. Because there is only one domain, there is no way to "offset" a weak area with a strong one at the domain level. Within that domain, the topics are broad, and a gap in any major subsystem can cost you.

For a deeper breakdown of how this single domain is organized, see our complete guide to the USCG-AE-LTD exam domains.

Where Candidates Tend to Lose Points

Without a verified failure-rate breakdown, we will not claim that a specific percentage of candidates miss a particular topic. What we can say qualitatively, based on how marine engineering knowledge is structured, is where unprepared candidates are most exposed.

Breadth Over Depth

Marine engineering covers a lot of ground. Candidates who study one comfortable area, such as the main engine, and neglect auxiliaries, electrical systems, or regulatory content often find the exam reaches into everything. Because the credential sits in a single broad domain, shallow coverage across the whole plant is a common weakness.

Regulation as Its Own Subject

Many practical engineers know how to run a plant but have not memorized the regulatory framing. The credential is administered by a regulatory body, so safety, pollution prevention, and compliance content is part of what you must be ready to demonstrate, not an afterthought.

Plant-Type Mismatch

Because the endorsement covers steam, motor, and gas turbine plants, candidates sometimes study the plant type they work on daily and are surprised by material tied to another. Clarify exactly which plant types your endorsement targets and prepare accordingly.

How to Read Pass Rate Claims Critically

Because the question "what is the pass rate?" is so common, many websites answer it with confident-looking numbers. Here is how to evaluate those claims for this credential.

1. Ask for the source. A legitimate pass rate cites who measured it, over what period, and for which exact credential. If the source is "industry estimates" or missing entirely, discount it.
2. Check the credential name. The acronym USCG-AE-LTD is easily confused with other credentials that share similar letters. Confirm that any statistic refers specifically to the National Assistant Engineer (Limited) Steam/Motor/GT endorsement from the Coast Guard National Maritime Center.
3. Separate first-time from repeat attempts. Aggregate figures that blend first attempts with retakes say little about your odds on a first sitting.
4. Remember self-selection. Candidates who attempt a credential have usually already met sea-service or training requirements, so raw pass percentages reflect a pre-filtered group.

Our fuller treatment of scoring expectations lives in the passing score guide, which explains why the pass mark and pass rate are different questions with different answers.

Steam, Motor, and Gas Turbine: Why Your Plant Type Matters

The title of this credential, Steam/Motor/GT, signals that it spans several propulsion technologies. That breadth shapes your preparation more than any pass-rate figure will.

Even if your daily experience is concentrated in one plant type, the safe approach is to confirm which categories your target endorsement requires and study each one that applies. Our requirements guide covers how eligibility and endorsement scope fit together.

A Domain-First Preparation Sequence

Because the exam content sits in a single domain, a short, topic-ordered plan beats generic study advice. The sequence below follows how the plant is actually built, from the systems that everything else depends on outward to the regulatory layer. Adjust the pacing to your own timeline.

For a fuller plan, including how to sequence reference material, see the USCG-AE-LTD study guide, and use our one-page cheat sheet for last-stage review. When you are ready to test yourself, the practice test lets you drill the same scope under realistic conditions.

Who Hires Limited Assistant Engineers

The pass rate question is ultimately a stand-in for a bigger one: is this credential worth pursuing? The endorsement qualifies mariners to serve in engineering roles aboard vessels, so demand tracks the maritime sectors that operate engineered plants. Typical employers fall into several broad groups, without any claim about specific hiring numbers:

• Commercial operators of vessels with steam, diesel, or gas turbine propulsion
• Companies running tugs, offshore support vessels, and other limited-tonnage or limited-route vessels
• Government and quasi-government fleets that rely on licensed engineers
• Shipyards and marine service firms that value licensed engineering knowledge

To explore this further, see our overview of USCG-AE-LTD jobs, and for earnings context without inflated claims, the salary guide and the ROI analysis take a measured look at what the credential can mean for your career.

Frequently Asked Questions