service unit
частина (підрозділ) тилу; обслуговуюча частина (підрозділ)
battery coolant unit / battery-coolant unit (BCU)
gear reduction unit / gear-reduction unit
position and navigation unit / position navigation unit (PNU)
pinch (a unit) out of a large unit
service support element (unit)
branch (military/service branch, armed service)
separate from active service / the service
Y service (Y-service) / Y-station
regional meteorological service/ regional weather service (RWS)