Definition of Earliest anticipated launch time

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Earliest anticipated launch time Definition from Government Dictionaries & Glossaries
DOD Dictionary of Military Terms
The earliest time expected for a special operations tactical element and its supporting platform to depart the staging or marshalling area together en route to the operations area. Also called EALT. (JP 3-05.1)
  
Source: U.S. Department of Defense, Joint Doctrine Division. ( About )