Time-in-Grade (TIG) - Per OPNAVINST 1811.3A, unless retirement in the next inferior grade is directed by SECNAV
for an officer or warrant officer under SECNAVINST 1920.6D, then officers, warrant officers, and enlisted members
retired voluntarily or transferred to the Fleet Reserve shall be retired in the highest grade satisfactorily held
upon completion of the following TIG requirements. COMNAVPERSCOM shall make determinations and recommendations of
satisfactory service, considering factors noted found in Paragraph 7h of the OPNAVINST 1811.3A.

Next Lower Grade (NLG) - Per OPNAVINST 1811.3A, COMNAVPERSCOM may authorize a member who does not meet the applicable
time-in-grade requirement to be retired in the next lower grade in which the member served on active duty satisfactorily.

TIG and NLG waiver submission requirements can be found at the PERS-835 link for officer retirements voluntary retirement
example.

Retire/Retain - a) Based on the needs of the Navy, an officer of the Regular Navy or a Reserve officer retiring under
reference 10 U.S.C. 6323 may request retention on Active Duty in a retired status or voluntary recall from retirement
and ordered to Active Duty. b) An officer may request retention or recall for a specific billet with unique operational
circumstances or when unique qualifications cannot be met by the Active Force or by continuation, per SECNAVINST 1920.7C.
c) An officer may request retention in the billet occupied at the time of retirement if necessary to affect an orderly
turnover, or to successfully accomplish a mission requirement. d) A retired officer may not be retained or recalled in a
number which will exceed the authorized strength or affect the promotion opportunity in any competitive category during
the anticipated period of Active Duty. e) Per 10 U.S.C. 619, a retired officer on Active Duty is not eligible for promotion
due to the fact the officer is not on the Active Duty list.