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deployment line; line of deployment (LD); line of departure
safe and secure environment
secure a crossing
secure a gap
secure area
secure environment
secure the air
secure the battle position
secure the objective
seize and secure (key terrain)
suppress, obscure, secure, reduce, and assault (SOSRA)
gun secure spring lanyard sling
automatic secure voice communication
secure mishap site
secure the operations
secure a hit
secure firing data
secure oneself
secure to a pier
secure
secure communications
secure supporting fires
secure an infantry commission
observer-target line (OT line)
scheme trail line (tag line)
armistice demarcation line
beyond line-of-sight (BLOS)
bulk distribution line
cease-fire line (CFL)
combat outpost line
confrontation line
contact line