Thick bush and other obstacles which make fire and observation difficult should be cleared from the immediate vicinity of the defended area. Protection and concealment. Fire positions should be concealed and protection obtained by the best use of buildings suitably sand-bagged and developed into strong points. All sub-units involved in the protection or defense of the sensitive point should be linked with an efficient system of communication. This should be duplicated.
External communications are also essential.
In certain circumstances it may be necessary to build towers to achieve this. This may be achieved with alternative positions. However, when the topography does not provide adequate concealment for alternative positions and the deployment of the reserve, it may be necessary to dig communication trenches. In close proximity. If necessary, towers should be built to achieve this.