So as long as you have an approved RNAV source, you can still fly this approach without ADF equipment. You cannot use RNAV to substitute for a localizer or SDF. retested on localizer back-course approaches during subsequent. It must be an IFR Approved, GPS-based RNAV and can be used to track a VOR or NDB, measure the distance from a VOR, NDB or named fix, and hold at a VOR, NDB or named fix. a nonprecision back-course approach to Runway 06 at Halifax International Airport. However, if you don't have an ADF, you can use a suitable RNAV system. In multiple places on the chart, you'll see a note that an 'ADF is required.' This is so you can locate and recognize the IAF, FAF, and MAP. The ILS 420 completed In-Service Decision in June 2015. The localizer needle in the airplane compares the relative strength it receives from both lobes and then shows a deflection. How a localizer works is it sends out two signal lobes: one at 90Hz and the other at 150Hz. When flying a back-course approach, an aircraft approaches the instrument runway from. A localizer back course is simply flying on the back side of the localizer to the runway. Presently the FAA has a contract with Thales ATM, Inc. The reciprocal of the localizer course for an ILS. There are also slightly higher circling minimums for the other runway. The GBNA (Ground Based Navigation Aids) supports all ground-based ILS systems in the National Airspace System (NAS) and will continue procuring and deploying new/replacement ILS for the foreseeable future. The straight-in minimums to Runway 05 are 1,860' MSL with 3/4 mile visibility (CAT A/B aircraft). The MOR SDF can be tuned using frequency 109.5, just like you would for any localizer. But just for fun, let's take a look at the approach plate. Ok, so you probably won't ever fly this approach. Localizer Course (bearing) The magnetic bearing of a Localizer (or Localizer course) is the measured angle between the localizer beam and Magnetic North at the localizer antenna and is coded using the Localizer.magneticBearing attribute. This leaves just ONE SDF approach left in the USA, the SDF to Runway 05 at the Moore-Murrell Airport (KMOR), Morristown, Tennessee. The VOR MON will ensure that regardless of an aircrafts position in the contiguous United States (CONUS), a MON airport (equipped with legacy ILS or VOR approaches) will be within 100 nautical miles. In 2018, the SDF to RWY 34 at the Marshfield Municipal Airport, Marshfield, WI (KMFI) was decommissioned.

SDF approaches are designed with a maximum descent gradient of 400 feet per NM (roughly a 4-degree descent angle), unless circling-only minimums are authorized.

If you're flying along a 12 degree SDF course, the same final approach area is significantly larger. This area is defined by a 6-degree course: 1,000 feet at or abeam the runway threshold expanding to 10 NM from the threshold. The final approach provides a minimum of 250 feet of obstacle clearance for straight-in approaches within the final approach area.

Localizer back course airports