Officer Aptitude Rating · ASTB-E
Officer Aptitude Rating (OAR): What the Navy OAR Is, How It Sits Inside the ASTB-E, and How to Prepare
The OAR is the officer-aptitude score inside the Navy's ASTB-E selection battery — three scored subtests, one composite number. This is the map: what it measures, where it sits, and the shortest route to a drilled, higher score.
The score
What the Officer Aptitude Rating Is
The Officer Aptitude Rating (OAR) is a score, not a certificate and not a licence — there is nothing to "get certified" in. It is the officer-aptitude composite drawn from three subtests, reported as one scaled number and read by selection boards as a single measure of how ready you are to reason under time.
Because it is one composite, the three subtests are not weighted equally in the hunt for points. Treat the OAR the way you treat a well-built question: know where the marks actually live before you spend a minute, then commit your effort there first.
3
Scored subtests
Math Skills, Mechanical Comprehension, Reading Comprehension
~20–80
Scaled composite
One officer-aptitude number, not a pass/fail stamp
ASTB-E
Parent battery
The OAR is its officer-aptitude subset
Battery map
How the OAR Sits Inside the ASTB-E
The ASTB-E is our exam family; the OAR is a slice of it, not a separate test next door. Every candidate who sits the ASTB-E takes the same three subtests that make up the OAR. Aviation applicants then sit additional sections on top of the OAR core, which feed the aviation composites — but if you are an officer candidate who only needs the OAR, those aviation parts are not yours to worry about.
Sort your prep the same way you sort answer choices: rule out what does not apply to you first. The full battery is broken down on our ASTB practice test page; this page stays on the OAR core.
| ASTB-E component | Who sits it |
|---|---|
| Math Skills Test | Every candidate — part of the OAR |
| Mechanical Comprehension Test | Every candidate — part of the OAR |
| Reading Comprehension Test | Every candidate — part of the OAR |
| Aviation-only sections (spatial, aviation/nautical, performance-based) | Aviation applicants, on top of the OAR |
Blueprint
The Three Subtests at a Glance
Three subtests, and they do not carry equal freight. The Math Skills Test is the heaviest and rewards the most preparation; the Mechanical Comprehension Test comes next; the Reading Comprehension Test is the lightest but the fastest to bleed points if you rush the passage.
The mechanic that wins the most marks per minute is the same across all three: read the four options before you read the stem, so you already know what the item is testing; then knock out the two distractors that cannot be right and find the single differentiator between the two that survive. Math traps repeat a number with one changed sign or decimal; mechanical traps flip a direction; reading traps over-state a supported conclusion. Learn the pattern per subtest and you stop falling for it.
Read the four answers before the question. On the OAR you are not recalling facts — you are ruling out the three that cannot be right and committing to the one that survives.
This site's weighting of the practice bank, mirroring the published subtest order — not an official NAMI item count.
Candidates & scoring
Who Sits It — and How It's Scored
The OAR is taken by prospective officers across the Navy, Marine Corps and Coast Guard — officer-programme and aviation candidates alike — and it is administered through the Naval Aerospace Medical Institute (NAMI) and its authorized testing sites. Your recruiter opens the door; the test itself is scheduled through those channels.
The composite is reported on a scaled score. What counts as a competitive number is not fixed and is not something this site will invent for you: minimums and cut-offs depend on your branch, your community and the specific programme, and they move. Confirm the target you actually need with your recruiter and current NAMI guidance rather than any figure you read on a prep site. The same goes for retake counts, waiting periods, and what you may bring to the desk — attribute those to current NAMI test-administration policy, not to us.
We are an independent study site and say so plainly on our about page — no affiliation with the Navy, the Coast Guard, the Marine Corps or NAMI.
Your route
How to Prepare
Work the blueprint in weight order. Drill the Math Skills Test first — our Math Skills depth guide breaks down the item types and the traps — then the Mechanical Comprehension Test with the Mechanical Comprehension depth guide, then keep the Reading Comprehension Test sharp so you do not give back easy points.
Then test the method under pressure: run the free OAR practice test across all three subtests, use each miss to find the trap you fell for, and re-run it. That loop — rule out, commit, review the rationale — is the whole game.
FAQ
OAR: Common Questions
What is an officer aptitude rating?
It is a scaled score measuring officer aptitude — not a credential or licence. It is built from three subtests (Math Skills, Mechanical Comprehension, Reading Comprehension) and reported as one composite number that selection boards read.
What is the OAR test in the Navy?
The OAR is the officer-aptitude portion of the Navy's ASTB-E selection battery. The three OAR subtests are what every ASTB-E candidate sits; aviation applicants take additional sections on top. It is administered through NAMI and authorized sites.
What's the difference between the OAR and the ASTB?
The ASTB-E is the whole battery; the OAR is a subset of it — the three subtests that yield the officer-aptitude composite. If you only need the OAR, you sit those three and skip the aviation-only sections. Our ASTB practice test page maps the full battery.
What is a good OAR score?
The composite is scaled (roughly 20–80), but there is no single "good" or "passing" number: competitive scores vary by branch, community and programme. Set your target from your own programme's current requirement via your recruiter and NAMI — not from a fixed figure.
Is the OAR test hard?
It is a timed reasoning test, so the difficulty is pace, not obscurity. The candidates who find it manageable are the ones who read the answers first, eliminate to two, and commit — rather than re-reading long stems. Drill that habit on the free practice test and it stops feeling hard.
OAR Exam Prep
Take the OAR question bank with you
Get the app for the full bank across all three OAR subtests, sampled to the real Math / Mechanical / Reading weighting — or keep drilling free on this site.