стежити за станом загороджень
maintain the momentum (of the advance)
maintain
maintain the order
maintain lines
maintain defense
maintain а command
maintain security
maintain close contact with the situation
maintain control
breaching of obstacles
negotiation of obstacles
passage of obstacles
timber obstacles
artificial beach obstacles
artificial underwater and beach obstacles
Modified Combined Obstacles Overlay (MCOO)
observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)
staggered obstacles
flanking obstacles
zone of obstacles
installation of obstacles
granite post obstacles
reduce obstacles