text: Appendix B
  SIGNAL SITE ANALYSIS AND SELECTION
  B-53. The operating characteristics, capabilities, and limitations of various communications systems create
  specific requirements for acceptable operating locations. Signal sites must be able to accomplish their
  assigned missions while remaining supportable and defensible.
  SITE ANALYSIS
  B-54. The G-6 (S-6) should conduct a signal site analysis of the entire area of operations, if possible. Signal
  site analysis and selection is a collaborative effort between the G-6 (S-6) and the G-3 (S-3). A thorough site
  analysis enables a meaningful course of action comparison during planning and provides flexibility when
  executing operations. The G-6 (S-6) analysis focuses on the ability of communications systems to provide
  coverage from the proposed site. The G-3 (S-3) analysis focuses on mobility, survivability, and sustainability.
  If the mission changes and operations move to another area, planners should already know which areas they
  can support with effective communications.
  B-55. Signal planners consider the operating characteristics, limitations, and effective planning distance for
  each available communications asset. As planners define communications requirements, the number of
  retransmission sites needed to cover the operational area may help determine supportability of proposed
  courses of action during the military decision-making process.
  B-56. The G-6 (S-6) coordinates with the G-2 (S-2) for terrain analysis and the current threat estimate. Signal
  planners evaluate the terrain (including man-made features) in the operational area to visualize how they can
  support the mission. Terrain and structures can render some communications systems ineffective. Planners
  consider the current threat estimate to prevent placing communications sites near known or anticipated enemy
  positions.
  Link Geometry
  B-57. The G-6 (S-6) analyzes the terrain to determine how to make the geometry of the operations work in
  favor of friendly forces. Improper link geometry makes it easier for the enemy to use direction finding
  jamming capabilities.
  B-58. When possible, terrestrial line of sight communications links should parallel the forward line of own
  troops. This keeps the primary signal strength of U.S. transmissions in friendly terrain. Deploying units and
  communications systems perpendicular to the forward line of own troops aims transmissions toward the
  enemy and makes it easier for the enemy to jam communications.
  Terrain Masking
  B-59. When possible, command post locations should place terrain features and manmade structures between
  friendly communications systems and enemy positions. This may require moving senior headquarters farther
  forward and using more jump or tactical command posts to ensure commanders can continue to direct their
  units effectively.
  Antenna Placement
  B-60. Command post locations generally determine antenna locations. The proper installation and
  positioning of antennas around command posts is critical. G-6 (S-6) planners and system operators should
  position antennas and radio frequency emitters as far as practical from the command post to spread out the
  electromagnetic signature.
  SITE SELECTION
  B-61. Based on the signal site analysis, the G-6 (S-6) recommends a signal site for each proposed course of
  action during the military decision-making process. The final site selected must be—
  * Able to support the selected course of action.
  * Logistically supportable.