Last updated: August 11, 2026
OAR Preparation: Your 12-Day Countdown
OAR preparation in the final 12 days before the test can feel like a sprint, but with the right approach, you can walk into the exam room confident and ready. When I was a candidate, the OAR (Officer Aptitude Rating) was the first big hurdle on the road to a Navy commission, and I remember the pressure of wanting to do well. Whether you’re aiming for a specific designator or just want to score your best, this plan will help you maximize your remaining time.
The OAR is a computer-based test that measures your math, reading, and mechanical comprehension skills. It’s part of the ASTB (Aviation Selection Test Battery) but is also used for non-aviation officer programs. Think of it as a cross between the ACT and SAT—the style and difficulty are similar, so if you did well on those, you have a head start. But even if standardized tests aren’t your strength, a focused study plan can make a big difference.
Let’s break down your 12-day plan, day by day, and cover some last-minute tips that will help you perform at your best.
Build a Focused Study Schedule
With only 12 days, you can’t cram everything, but you can target your weak areas and get comfortable with the test format. Start by taking a practice test to identify where you need the most work. Then, allocate your study time accordingly.
- Days 1-3: Focus on math. Review basic algebra, geometry, and word problems. Use practice questions to build speed.
- Days 4-6: Shift to reading comprehension. Practice summarizing passages and answering questions quickly.
- Days 7-9: Work on mechanical comprehension. If you’re not familiar with pulleys, levers, and basic physics, this is where you’ll need extra time.
- Days 10-11: Take full-length practice tests under timed conditions. Review your mistakes and drill the areas that are still shaky.
- Day 12: Light review only. Go over key formulas and strategies, but don’t burn yourself out.
Remember, quality over quantity. Two hours of focused studying beats four hours of distracted flipping through notes.
Leverage Community Resources and Practice Tools
You’re not alone in this. The military community is full of people who’ve been where you are, and they’re generous with advice. When I was preparing, I found that forums like airwarriors.com (a Navy/Air Force officer candidate community) were goldmines of OAR prep material and advice. Reddit is also a great place to search for “OAR” and find threads where candidates share their experiences and tips.
In addition to traditional prep books, consider using AI tools like Claude or ChatGPT to generate extra practice questions. You can ask for math problems or reading passages tailored to the OAR’s difficulty level. YouTube is another resource—there are short tutorials that explain concepts quickly, which are perfect for a quick review.
Just be careful not to get lost in the sea of information. Stick to a few reliable sources and use them consistently.
Prioritize Test Day Rest
One of the most overlooked aspects of OAR preparation is sleep. The night before the test, get a full night’s rest. I know it’s tempting to stay up late doing one more practice set, but a tired brain will cost you points. When I took the OAR, I made sure to be in bed by 10 PM, and I woke up feeling sharp. That mental clarity is worth more than any last-minute cramming.
On test day, eat a good breakfast, arrive early, and take a few deep breaths before you start. The OAR is adaptive, so the questions get harder as you answer correctly—don’t let that throw you off. Just do your best on each question and move on.
Treat the OAR Like the ACT or SAT
If you’ve taken the ACT or SAT, you already have a sense of the OAR’s style. The questions are similar in format and difficulty, so use that experience to your advantage. Practice pacing yourself—you have a limited time for each section, so don’t get stuck on a single question. Skip and come back if you have time.
Also, don’t neglect the mechanical comprehension section if you’re not from a technical background. It’s often the most challenging for liberal arts types like me. I spent extra time on that section during my prep, and it paid off.
Remember, the OAR is just one part of your officer package. A good score helps, but it’s not the only thing that matters. Your GPA, leadership experience, and overall fitness for the Navy all play a role. So, while you want to do your best, don’t let the OAR define you.
Supplement with AI and YouTube Shorts
If you’re looking for extra practice, AI tools and YouTube shorts can be a great supplement. For example, you can ask an AI to generate 10 math word problems at the OAR’s difficulty level and then solve them. Or, watch a 5-minute YouTube video explaining a concept you’re struggling with. These resources are flexible and can fit into your schedule easily.
However, don’t rely solely on these. Official prep materials and practice tests are still your best bet because they’re closest to the real thing. Use AI and videos to fill gaps, not as your primary study method.
Final Thoughts on OAR Preparation
You’ve got 12 days—make them count. Build a schedule, use community resources, get your sleep, and treat the OAR like the standardized test it is. When I went through OCS, the candidates who did well on the OAR were the ones who prepared consistently, not necessarily the ones who studied the most hours. So, stay focused, stay calm, and trust your preparation.
For more guidance on the entire Navy OCS journey, check out the Navy OCS Journey page. You’ve got this—I believe in you. Fair winds and following seas.
This post is part of ASTB & OAR Preparation — every post here on the OAR and ASTB-E, in reading order.
