відкритий / неприхований напад
open burning and open detonation (OBOD) (= open-pit)
open country / open ground
top-attack (top attack; top-down attack )
open an attack
drone swarm attack / drone swarming attack
break-open
open arrest
open barrel sight
open boat
open column
open emplacement
open fire
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
open wound
open-source information
take to the open
networked open versatile architecture
open bolt