відкривати вогонь
open burning and open detonation (OBOD) (= open-pit)
open country / open ground
fire over open sights (fire over sights)
slant fire; diagonal fire; oblique fire; fire to the oblique
fire over (open) sights
open up with fire
open deadly fire
open fire!
fire control orders (FCO) ('Hold Fire', 'Cease Fire' and 'Engage')
selector lever, fire selector, fire switch, fire selector switch
break-open
open arrest
open attack
open barrel sight
open boat
open column
open emplacement
open flank
open formation
open hostilities
open order
open out
open position
open range
open route
Open Skies Treaty
open source intelligence (OSINT)
open submarine warfare
open time
open weapon emplacement
open wire
open work