Safeguarding measures are designed to:

• Protect the blocks of air through which aircraft fly-by preventing penetration of protective surfaces (Physical Safeguarding)
  
  
• Protect the integrity of radar and other electronic communications, navigational and surveillance equipment, by preventing reflections and diffractions of radio signals etc.(technical safeguarding)
  
  
• Protect visual aids, such as approach and runway lighting, preventing them from being obscured, or preventing the installation of other lights which may confuse pilots or air traffic controllers
  
  
• Avoid any increase in the risk to aircraft operations by birds