основний, запасний, резервний, аварійний
emergency service / emergency operations service
FAST PACE
keep pace
pace
pace count; pacing
pace of offensive
pace setter (soldier / vehicle)
keep pace with the armor
set the pace
pace counter
pace off
pace setter
pace survey
pace tally
pace-counter
gunner's primary sight (GPS)
officer of primary responsibility
primary (fire) position
primary arm
primary armament
primary burn
primary control surface
primary sector of fire
primary high explosive
primary military occupational specialty (MOS)
primary mission
primary reserve
primary target
primary target line (PTL)
primary trainer
primary weapon
primary position