Took about 2 minutes to find this by putting doing a search on Google. You could have had your answer yesterday. Disclaimer: this information may or may not be correct. Therefore, I highly recommend you contact your recruiter and find out EVERYTHING that will be required of you.
From:
http://www.cnrc.navy.mil/noru/orojt/introduction.htm#12
AVIATION SELECTION TEST BATTERY
1. Test Overview
a. Applicants for Officer Candidate School, as well as for various direct appointment programs as specified elsewhere in this manual, will be administered applicable portions of the Aviation Selection Test Battery (ASTB). The ASTB need not be administered to nuclear officer program applicants. Nuclear officer program applicants requesting consideration for other officer candidate school programs are not required to take the ASTB unless directed by CNRC. "Form 3" “4” and "5" of each portion of this test battery are in current use.
b. The ASTB should be given in its entirety to all applicants who indicate an interest in aviation programs. The ASTB is divided into five parts: (1) The Math/Verbal Test (MVT), (2) Mechanical Comprehension Test (MCT), (3) Spatial Apperception Test (SAT), (4) Aviation/Nautical Information Test (ANT), and (5) Biographical Inventory (BI). Testing time is 2.5 hours. From these five parts, six scores are derived, (1) Academic Qualification Rating (AQR), (2) Pilot Flight Aptitude Rating (PFAR), (3) Flight Officer Aptitude Rating (FOAR), (4) Pilot Biographical Inventory (PBI), (5) Flight Officer Biographical Inventory (FOBI), and (6) Officer Aptitude Rating (OAR). Currently the PBI and FOBI are suspended. Please click on highlighted area above for the OGRAM article explaining it.
c. The Officer Aptitude Rating (OAR) portion of the test may be given to individuals who are not interested/not qualified for aviation programs. If the individual passes the OAR, and wishes to take the remaining portions of the test, they must do so within the 180- day time-frame. Taking individual portions of the ASTB are not authorized.
d. The OAR is the term used to identify the single index derived when administering only the MVT and MCT. This is applicable only to non-aviation designators, i.e., all non-engineering OCS programs and various direct appointment programs as specific elsewhere in this manual.
e. The ASTB should be given in its entirety to those recruiting personnel (officer and enlisted) who may express an interest in applying for an officer program or requesting redesignation to another officer community prior to being designated as a test administrator.