hostile observation

screen hostile observation

observation point / observation post (OP)

Allied Joint Doctrine for Recovery of Personnel in a Hostile Environment (AJP-3.7)

hostile act

hostile action

hostile activity and influences

hostile aircraft

hostile boarding

hostile counterpart

hostile environment

hostile fire pay

hostile intent

hostile shore

hostile territory

hostile unit

roll up the hostile flanks

swift entry into hostile territory

break up hostile attack formations

degradation of hostile emitters

enter hostile airspace

hostile battery history sheet

hostile encounter

Hostile Environment Awareness Training (HEAT)

avenues of approach within the hostile positions

within the hostile positions

hostile intention

smother hostile defenses

divert the hostile approach

close observation

command-and-observation post

forward observer (FO), forward observation officer; (artillery) observer / spotter

infrared night vision observation device