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OA-OZ Officer Personnel.
OA MARINE CORPS (OFFICERS).
OA1 Major general.
OA2 Brigadier general.
OA3 Colonels.
OA4 Lieutenant colonels.
OA5 Majors.
OA6 Captains.
OA7 First lieutenants.
OA8 Second lieutenants.
OA9 Marine gunners.
OA11 Pay clerks.
OA12 Warrant officers.
OB RESERVE CORPS.
(Combine with corps and ranks, added for each class of reserve).
OC NAVAL CONSTRUCTOR CORPS.
OC12 Naval constructors.
OC13 Assistant naval constructors.
(To show any particular rank add rank numbers as shown under "Line.")
OD DENTAL CORPS.
OD12 Dental surgeons.
OD13 Passed assistant dental surgeons.
OD14 Assistant dental surgeons.
OD15 Acting assistant dental surgeons.
(To show any particular rank add rank numbers as shown under "Line,").
OE CIVIL ENGINEER CORPS.
OE12 Civil engineers.
OE13 Assistant civil engineers.
(To show any particular rank add rank numbers as shown under "Line.").
OF ADMINISTRATIVE AND/OR TACTICAL OFFICERS AFLOAT.
OF1 Commander in chief.
OF2 Fleet commander.
OF3 Detachment commander.
OF4 Force commander.
OF5 Flotilla commander.
OF6 Squadron commander.
OF7 Division commander.
OF8 Section commander.
OF9 Unit commander.
OF10 Commanding officer.
OF11 Executive officer.
OF12 First lieutenant.
OF13 Engineer officer.
OF14 Gunnery officer.
OF15 Navigation officer.
OF16 Medical officer.
OF17 Supply officer.
OF17-1 Disbursing officer.
OF18 Communication officer.
OF19 Assistant fire-control officer.
OF20 Assistant engineer officer.
OF21 Watch and division officer.
OF22 Senior officer present afloat.
OF23 Officer on the staff.
OF24 Officer of the deck.
OF25 Officer of the engineroom watch.
OF26 Immediate superior in command.
OF27 Finance officer.
OF28 Chief of Staff.
OF29 Aviation officers.
OG NURSE CORPS.
OG1 Nurse corps superintendent.
OG2 Nurse, chief.
OG3 Nurse.
OG4 Nurse, Reserve.
OH CHAPLAIN CORPS.
OH12 Chaplains.
OH13 Acting chaplains.
(To show any particular rank add rank numbers as shown under "Line.").
OK STAFF OFFICERS.
OL LINE OFFICERS.
OL1 Admirals.
OL2 Vice admirals.
OL3 Rear admirals.
OL4 Captains.
OL5 Commanders.
OL6 Lieutenant commanders.
OL7 Lieutenants.
OL8 Lieutenant's (junior grade).
OL9 Ensigns.
OL10 Acting ensigns.
QL11 Midshipmen.
OM MEDICAL CORPS.
OM12 Medical directors.
OM13 Medical inspectors.
OM14 Surgeons.
OM15 Passed assistant surgeons.
OM17 Acting assistant surgeons.
(To show any particular rank add rank numbers as shown under "Line".)
ON ADMINISTRATIVE OFFICERS ASHORE.
ON1 Military governor.
ON2 Commandant.
ON3 Commanding officer ashore.
ON4 Industrial manager.
ON5 Captain of the yard.
ON6 Executive officer ashore.
ON7 Engineer officer.
ON8 Construction officer.
ON9 Public works officer.
ON10 Inspection officer.
ON11 Supply officer.
ON12 Disbursing officer.
ON13 Accounting officer.
ON14 Medical officer.
ON15 Communication officer.
ON16 Injury officer.
ON17 Duty officer.
ON18 Dental officer.
ON19 Destroyer stores officer.
ON20 Patrol officer (senior officer or other).
ON21 Radio material officer.
ON22 Intelligence officers.
OO OFFICER PERSONNEL.
OO1 Chiefs of bureau.
OO2 Assistant chiefs of bureau.
The name title file number for correspondence on an individual officer shall be the letter "OO" followed by the file serial number assigned to that officer by the Bureau of Navigation. Ships and stations may obtain the serial number in question from the copy of the officer's orders, ordering him to the station. The symbol "OO" combined with the name of the officer involved may also be used.
OP PROFESSORS OF MATHEMATICS.
OQ FOREIGN OFFICERS (OTHER THAN ATTACHÉS).
(Combine with corps and rank, title numbers as necessary.)
OR RETIRED OFFICERS.
OS SUPPLY CORPS.
OS12 Pay directors.
OS13 Pay inspectors.
OS14 Paymasters.
OS15 Past assistant paymasters.
OS16 Assistant paymasters.
OS17 Disbursing officers, general.
(To show any particular rank add rank numbers as shown under "Line.")
OT MERCHANT MARINE OFFICERS.
OV AVIATION OFFICERS.
OV1 Flight surgeon.
OV2 Observers.
OV3 Aerological.
OV4 Aviators.
Heavier than air.
Lighter than air.OW WARRANT OFFICERS.
OW1 Chief boatswains.
OW2 Boatswains.
OW3 Chief gunners.
OW4 Gunners.
OW5 Chief machinists.
OW6 Machinists.
OW7 Chief carpenters.
OW8 Carpenters.
OW9 Chief pharmacists.
OW10 Pharmacists.
OW11 Chief pay clerks.
OW12 Pay clerks.
OW13 Acting pay clerks.
OW14 Chief electricians.
OW15 Electricians.
OW16 Chief radio electricians.
OW17 Radio electricians.
OZ NAVAL MILITIA OFFICERS.
The file number on correspondence regarding a particular officer or enlisted man shall be for an officer the file number assigned him by the Bureau of Navigation or OO, followed by his name, and for an enlisted man MM, followed by his service number, and in either case may or may not include a subject or name title file number. In the case of an officer it shall be optional to use either the number assigned by the Bureau of Navigation or OO, followed by the officer's name.
Example.--Subject, Lieut. J. J. Jones, orders; file No. 32165; OO Jones, J. J.; OO, Jones, J. J./P16-4.The file number on correspondence regarding several officers or several enlisted men shall be for officers the file number assigned by the Bureau or Navigation or OO, followed by the name, and for enlisted men MM, followed by the service number of the first individual listed, and may or may not include a subject or name title file number. In general correspondence relating to several individuals it shall be optional to use the name of the first individual, as above provided, or to use the subject or name title numbers. In orders to a draft of men by name or ratings the file number shall, in addition, include the personnel group subject title file number and the name title file number of the ship or station to which the draft is to proceed.
Example.--Subject, orders to a draft of men from receiving ship New York to U.S. S. Florida, Seaman W. W. Smith being the first man mentioned by name in the orders; file No. MM-243612/BB30/P16-1; subject, travel orders to officers listed, at PG school; NC4/P16-4.