9 3 2 ▁at ▁Berlin - Temp el hof ▁Central ▁Airport ▁( G erm any ) ▁named ▁L FF ▁or ▁" L or enz ▁beam " ▁due ▁its ▁invent or , ▁the ▁C . ▁Lor enz ▁AG ▁company . ▁The ▁Civil ▁Aer onaut ics ▁Administration ▁( CAA ) ▁author ized ▁installation ▁of ▁the ▁system ▁in ▁ 1 9 4 1 ▁at ▁six ▁locations . ▁The ▁first ▁landing ▁of ▁a ▁scheduled ▁U . S . ▁passenger ▁air lin er ▁using ▁I LS ▁was ▁on ▁January ▁ 2 6 , ▁ 1 9 3 8 , ▁when ▁a ▁Pennsylvania ▁Central ▁Airlines ▁Bo eing ▁ 2 4 7 D ▁fle w ▁from ▁Washington , ▁D . C ., ▁to ▁Pitts burgh , ▁Pennsylvania , ▁and ▁land ed ▁in ▁a ▁snow st orm ▁using ▁only ▁the ▁Inst rument ▁Land ing ▁System . ▁ ▁The ▁first ▁fully ▁automatic ▁landing ▁using ▁I LS ▁occurred ▁in ▁March ▁ 1 9 6 4 ▁at ▁Bed ford ▁Airport ▁in ▁UK . ▁ ▁Altern atives ▁ ▁The ▁Mic row ave ▁Land ing ▁System ▁( ML S ) ▁allowed ▁for ▁cur ved ▁approaches . ▁It ▁was ▁introduced ▁in ▁the ▁ 1 9 7 0 s ▁to ▁replace ▁I LS ▁but ▁fell ▁out ▁of ▁favor ▁because ▁of ▁the ▁introduction ▁of ▁ ▁satellite ▁based ▁systems . ▁ ▁In ▁the ▁ 1 9 8 0 s , ▁there ▁was ▁a ▁major ▁US ▁and ▁European ▁effort ▁to ▁establish ▁M LS . ▁But ▁a ▁combination ▁of ▁air line ▁rel uct ance ▁to ▁invest ▁and ▁the ▁rise ▁of ▁Global ▁Navigation