VERTREP operating area (VOA)

vertical replenishment (VERTREP)

VERTREP pick-up and delivery zone

missile operating area

battlefield operating system (BOS)

buffer and operating-rod group

common operating environment (COE)

contemporary operational environment / contemporary operating environment (COE)

deployment operating base

emergency fleet operating base

forward operating base (FOB)

ground operating equipment

naval base; naval operating base

naval operating base (fixed or temporary)

operating environment (OE)

operating forces

operating forces of the Navy

operating frequency

operating mechanism

operating principle

operating procedures

operating rod assembly

operating rod group

operating speed

operating stocks; working stock

operating tempo (OPTEMPO)

standard operating procedure(s) (SOP)

standing operating procedure (SOP)

traffic operating center

main operating base

Signal Operating Instructions (SOI)

Standard Operating Procedures (SOPs)

Standing Operating Procedures (SOPs)