gap crossing operation

hasty gap crossing

level-crossing = (амер.) grade crossing

clear / cut a gap

exploit a gap

fill / plug the gap

gap marker

gap-filler radar

seal the gap

secure a gap

time gap

air-gap / air wal

constricted air gap spark plug

gap wind

lighting gap

gap filling

gap-filling radar

spark-gap anti-TR tube

spark-gap TR tube

spark-gap transmit-receive tube

spark-gap tube

gap

close the gap

column gap

time-gap of column

slat gap

clandestine operation; covert operation

humanitarian operation; humanitarian relief operation (HUMRO)

PZ operation (pick-up zone operation)

noncombatant evacuation operation (NEO); non-combat evacuation operation

assault crossing

assault crossing site

assault stream-crossing equipment