Proximity. The base must surround or be located as close as possible to the activities or installations it
supports on a normal day-to-day operation.
Security and defensive capabilities. Besides meeting operational needs, the position should provide
adequate security and defense against enemy sabotage and direct attacks. Most of the time, the
support mission of the base is the main factor in determining its physical location in the rear area.
Communications. The presence of communications is highly important in picking a possible base
location. The area signal system is the primary communication link for the rear operation. Each base
and base cluster will have organic radio equipment dedicated to the rear operation net as an alternate
means of communication. In some instances, tenant units may augment base communications.
Coordinate with the local communications-electronics staff office. This may be necessary to assist in
gaining access to the area communications system.
Internal layout. The internal layout of the base should be such that it supports both the base's support
mission as well as base defense operations.
The final selection of a site includes a thorough ground recon of the sites chosen by map recon. Once
an area has been selected and the ground recon has been completed, the tentative locations of base
elements are determined and marked with signs. Sketches of the area are prepared. Show the
approximate location of each element. The traffic circulation plan, observation or listening posts
(OPs/LPs), motor parks, and the base defense plan are developed. The sketches should also show the
locations and directions of fire for crew-served weapons. A strip map showing the route of movement
should be prepared for use by drivers and by those who will be in charge of the movement.
A Base Cluster. A base cluster normally covers a larger geographical area than a base. Base clusters
contain several bases that are grouped together to enhance their security as well as to facilitate their
support of combat forces. A base cluster normally does not have a defined perimeter or a set access
point. For rear operation purposes, the base cluster is the next higher tactical command and control
headquarters of the base. The base cluster commander is normally a commander who has a
headquarters and staff. They will have the capability to establish a base cluster operations center
(BCOC). The BCOC is the nucleus for all matters concerning the rear operations within the cluster. It
has the command and control means to plan, coordinate, and supervise a base cluster. The BCOC is
like a tactical operations center (TOC). It coordinates base defense operations and plans. It also set
ups and maintains communications with bases. The RAOC/RTOC collects and disseminates
employment of MP and/or combat forces to assist base defense forces in defeating Levels II and III
Isolated Units. Most CSS units in the corps rear area are in a base cluster. However, some may
operate from independent or isolated bases. These units