▁History ▁of ▁A ircraft ▁Land ing ▁A ids ▁– ▁U . S . ▁Cent enn ial ▁of ▁Fl ight ▁Commission ▁ ▁" H appy ▁Land ings ▁In ▁F og ", ▁June ▁ 1 9 3 3 , ▁Popular ▁Mechan ics ▁article ▁on ▁the ▁early ▁system ▁setup ▁in ▁the ▁USA . ▁ ▁I LS ▁Bas ics ▁ ▁I LS ▁T utorial ▁Anim ations ▁ ▁Website ▁dedicated ▁to ▁the ▁description ▁of ▁I LS ▁ ▁I LS ▁T utorial ▁An imation ▁Illustr ates ▁and ▁describes ▁how ▁are ▁I LS ▁navigation ▁signals ▁displayed ▁on ▁board ▁of ▁an ▁aircraft ▁in ▁various ▁positions , ▁which ▁may ▁occur ▁during ▁a ▁safe ▁approach ▁for ▁landing . ▁ ▁C ategories ▁of ▁the ▁I LS ▁ ▁Category : 1 9 2 9 ▁in ▁av iation ▁Category : A ids ▁to ▁navigation ▁Category : A ircraft ▁landing ▁systems ▁Category : Av ion ics ▁Category : Radio ▁navigation ▁Category : Radio ▁stations ▁and ▁systems ▁IT U ▁Category : Run way ▁safety ▁Category : Types ▁of ▁final ▁approach ▁( av iation ) <0x0A> </s> ▁E ux esta ▁ap ical is ▁is ▁a ▁species ▁of ▁ul idi id ▁or ▁picture - wing ed ▁fly ▁in ▁the ▁genus ▁E ux esta ▁of ▁the ▁family ▁Ul idi idae . ▁ ▁References ▁ ▁Category : E ux esta <0x0A> </s> ▁B ö dd iger ▁Berg ▁is ▁a ▁small ▁v ine yard ▁next ▁to ▁village ▁B ö dd iger , ▁which ▁is ▁part ▁of ▁town ship ▁F els berg ▁in ▁the ▁county ▁of ▁Schw alm - E der - K re