rel moi ja'a lujvo

j₁ has the rank of Captain/Lieutenant/Flight Lieutenant (equivalent of NATO OF-2) in military unit /organization j₂.

Cf. so, moi, jatna, jemja'a, vairsoi, cibmoija'a, pavmoija'a. Based on STANAG 2116: NATO Codes for Grades of Military Personnel.

jbovlaste

In notes:

cibmoija'a: j₁ has the rank of Major/Lieutenant Commander/Squadron Leader (equivalent of NATO OF-3) in military unit /organization j₂.
pavmoija'a: j₁ has the rank of Lieutenant/1st Lieutenant (equivalent of NATO OF-1) in military unit /organization j₂.