I) Supplementary, optional component that may be employed to increase safety and utility V) There may be a back-course marker to indicate the back-course FAF Iv) Inner marker ( IM) located at decision height on glidepath for Category II approach Iii) Middle marker ( MM) located approximately 3,500 feet from landing threshold at position where glide-slope centerline is about 200 feet above touchdown zone elevation Ii) Outer marker ( OM) located 4-7 miles from airport near position where aircraft at appropriate altitude will intercept glidepath I) Low-powered transmitters direct signal upward in a small fan-shaped pattern Iv) GS normally 1.4° thick (about 1,500 feet at 10 NM from touchdown, narrowing to just a few feet at touchdown) Iii) GS signal is radiated on front course only (NOT on back course)
Ii) Projection angle normally adjusted to 2.5-3.5° above horizontal to intersect the middle marker ( MM) at about 200 feet and the outer marker ( OM) at about 1,400 feet above runway elevation I) Located in a building 750-1,250 feet from approach end of runway, 400-600 feet to one side of centerline
SDF LOCALIZER PLUS
Iv) Audibly identified by "I" plus three-letter designator and includes a voice feature for use by ATC Iii) LOC course width normally 5° (full-scale deflection when aircraft is 2.5° to either side of centerline) Ii) Transmits on odd tenths from 108.1 to 111.95 MHz out to 18 NM away from and 4,500 feet above the antenna site I) Antenna array located beyond opposite end of runway that radiates a field pattern providing left/right guidance along the centerline of the runway (in both directions) Approach height not less than 100 feet above touchdown.Instrument Landing Systems (ILS) (includesġ) ILS is an electronic system that provides horizontal and vertical guidance to a specific runway, used to execute a precision instrument approach.Ģ) Three types based on equipment at airport and pilot experience levelĪ) Category I - approach height not less than 200 feet above touchdown Flight instrument systems and their operating characteristicsĬ.
Aircraft Flight Instruments and Navigation EquipmentĢ.
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