If you are only concerned about the OAR, WHY would you worry about the other sections?? Please explain.....
In one of the recent guides, it stated "During the Test Administration, examinees have the option of taking the entire test battery or the OAR portion of the test, which consists of the math skills test, reading comprehension test, and mechanical comprehension test. Examinees that take only the OAR portion will receive only one score, the officer aptitude rating (oar), which is used to predict academic performance in the Navy Officer Candidate School (OCS)."
so, should i just focused on the sections listed?
You keep answering your own questions
...they stated that i have to take the whole exam...
That depends on what designator you're applying for. If you are unsure of a specific designator or have a few different ones in mind, then you'll want to take the whole test as so not to limit your options. If you have a specific designator that does not require anything but the OAR, then you'll probably just want to take that section only. What are you applying for?