▁T - 2 9 ▁Navigation ▁Tra iner . ▁ ▁Test s ▁of ▁both ▁the ▁communic ations ▁architecture ▁and ▁position ▁location ▁cap ability ▁were ▁conducted ▁and ▁the ▁overall ▁system ▁design ▁was ▁shown ▁to ▁be ▁practical . ▁ ▁Note ▁that ▁this ▁demonstr ation ▁preced ed ▁G PS , ▁E ther net ▁and ▁the ▁internet ▁each ▁of ▁which ▁incorpor ated ▁similar ▁princip als . ▁ ▁It ▁is ▁also ▁worth ▁not ing ▁that ▁these ▁experiments ▁would ▁not ▁have ▁been ▁possible ▁without ▁the ▁support ▁of ▁John ▁K lot z ▁of ▁DO D / DD R & E . ▁ ▁In ▁ 1 9 7 2 ▁General ▁Ken ▁Russell , ▁the ▁A W AC S ▁System ▁Program ▁Office ▁chief ▁asked ▁Ell ings on ▁if ▁M IT RE ▁could ▁support ▁a ▁ 1 9 7 3 ▁demonstr ation ▁of ▁A W AC S ▁to ▁key ▁NAT O ▁personnel ▁in ▁Europe . ▁ ▁The ▁idea ▁was ▁to ▁bring ▁the ▁A W AC S ▁data ▁to ▁the ▁ground ▁command ▁and ▁control ▁cent ers ▁in ▁selected ▁locations ▁throughout ▁Europe ▁to ▁show ▁how ▁A W AC S ▁could ▁augment ▁their ▁existing ▁air ▁defense ▁cap ability . ▁ ▁Russell ▁thought ▁that ▁the ▁M IT RE ▁C AS OFF ▁demonstr ation ▁system ▁could ▁do ▁the ▁job . ▁ ▁Ell ings on ▁respond ed ▁in ▁the ▁aff irm ative ▁and ▁immediately ▁set ▁about ▁to ▁implement ▁the ▁needed ▁interfaces ▁with ▁the ▁various ▁NAT O ▁systems ▁and ▁equ ipping ▁a ▁K C 1 3 5 ▁aircraft ▁that ▁was ▁to ▁be ▁used ▁as ▁a ▁relay . ▁ ▁In ▁ 1