4-117. Reducing electronic signatures (leaving radio and digital systems off or in radio listening silence mode as much as possible) enhances OPSEC and survivability against adversary or enemy direction-finding capabilities. The proliferation of information technologies and dependence upon them for routine mission command functions creates vulnerabilities. Minimizing those vulnerabilities requires strict adherence to disciplined procedures appropriate for the corps AO. Restrictions on the use of personal electronic devices and social media should be a key consideration for OPSEC and reducing the electronic signatures of units.