It may also provide security by setting up OPs, roadblocks, or traffic control points. CS elements are positioned with units they are to support. They are located to provide support to all elements of the battalion. The battalion CP and trains are centrally located for security, which helps to plan, issue orders, distribute supplies, and so on. Communication between elements is by wire or by messenger.
Radio is used only in an emergency.
Company positions within the battalion assembly area should aid movement for future operations. This may result in mortars positioned in adjacent company sectors where emplacement must be coordinated. Mortars are normally employed with two-thirds of their range forward. This covers the center of the company sector as the main direction of fire. The quartering party must prepare for occupation of an assembly area during limited visibility.