The Chairman of the Joint Chiefs of Staff has issued new
doctrine on the conduct of electronic warfare.
"The recognized need for military forces to have unimpeded
access to and use of the [electromagnetic environment] creates
vulnerabilities and opportunities for electronic warfare (EW)
in support of military operations."
"The purpose of EW is to deny the opponent an advantage in the
EM spectrum and ensure friendly unimpeded access to the EM
spectrum portion of the information environment. "
"EW can be applied from air, sea, land, and space by manned and
unmanned systems."
See "Electronic Warfare," Joint Publication JP 3-13.1, 25
January 2007:
http://www.fas. org/irp/doddir/ dod/jp3-13- 1.pdf