▁critical ▁capabilities ▁in ▁the ▁field ▁of ▁Lar ge ▁Systems ▁allowed ▁the ▁company ▁to ▁offer ▁global ▁solutions ▁for ▁Air ▁Tra ffic ▁Management , ▁including ▁turn ▁key ▁air port ▁systems . ▁From ▁meteor ological ▁systems ▁to ▁A TC ▁( A ir ▁Tra ffic ▁Control ) ▁sens ors , ▁from ▁ground ▁stations ▁to ▁air space ▁traffic ▁management , ▁the ▁company ▁offered ▁wide ▁range ▁solutions . ▁The ▁company ▁also ▁offered ▁solutions ▁for ▁mar itime ▁and ▁coast al ▁surve ill ance ▁with ▁its ▁V essel ▁Tra ffic ▁Management ▁System . ▁ ▁Def ence ▁Systems ▁ ▁SE LE X ▁S ist emi ▁Integr ati ▁was ▁active ▁in ▁the ▁design , ▁development ▁and ▁sale ▁of ▁integrated ▁combat ▁naval ▁systems , ▁combat ▁management ▁systems , ▁command ▁and ▁control ▁systems , ▁fire ▁control ▁systems , ▁rad ar ▁and ▁electro - opt ical ▁sens ors , ▁simulation ▁and ▁training ▁systems . ▁SE LE X ▁S ist emi ▁Integr ati ▁also ▁offered ▁support ▁mission ▁systems ▁including ▁planning ▁and ▁mission ▁systems , ▁information ▁management ▁systems ▁for ▁the ▁log istic ▁process ▁support ▁and ▁test ▁and ▁validation ▁integrated ▁systems . ▁ ▁With ▁the ▁fixed ▁( F AD R ) ▁and ▁deploy able ▁( D AD R ) ▁version ▁of ▁R AT 3 1 DL , ▁SE LE X ▁S ist emi ▁Integr ati ▁was ▁the ▁main ▁European ▁supp lier ▁of ▁ 3 D ▁long - range ▁rad ar ▁into ▁the ▁NAT O ▁area . ▁ ▁Rad ar ▁Museum ▁ ▁On ▁April ▁ 2 , ▁ 2 0 0 9 ▁SE LE X ▁S ist emi ▁Integr ati