черговий офіцер
field officer (field-grade officer / senior officer)
duty, off duty
duty, on duty
airlift duty officer
fighter duty officer
reconnaissance duty officer
active-duty Naval flag officer
duty petty officer
adviser duty officer
operations duty officer
active service/ duty
combat alert duty
combat duty assignment
command billet / duty / installation
command duty
demolition duty
duty roster
entry on active duty
foreign duty
full time military duty
guard duty
inactive duty training (IDT)
interior guard duty
medical duty
off duty
on duty
parachute duty
patrol duty
permanent duty station
principal duty
return to duty (RTD)
routine military duty