Dec 01, 2016 · A localizer back course is simply flying on the back side of the localizer to the runway. How a localizer works is it sends out two signal lobes: one at 90Hz and the other at 150Hz. The localizer needle in the airplane compares the relative strength it receives from both lobes and then shows a deflection.
These are called the front and back courses, respectively. The localizer provides course guidance, transmitted at 108.1 to 111.95 MHz (odd tenths only), throughout the descent path to the runway threshold from a distance of 18 NM from the antenna to an altitude of 4,500 feet above the elevation of the antenna site.
Feb 06, 2016 · Back-course approaches typically carry minimums near or right at those of a front course, but a smart pilot will add a fudge factor of at least 100 feet. Trying to fly a glideslope needle normally and a localizer backward is a trick that deserves practice.
Jun 21, 2017 · Charles22 on Jun 21, 2017 . Russ, Thanks for your reply. I do not intend to follow a back course signal that is not published. On a simulator I have seen that the red flag appears on the HSI, when the airplane is on the back side of the …
The OM is located on the localizer front course 4 to 7 miles from the airport to indicate a position at which an aircraft, at the appropriate altitude on the localizer course, will intercept the glide path.
The ALS provides lights that will penetrate the atmosphere far enough from touchdown to give directional, distance, and glide path information for safe visual transition. Pilots must be instrument rated and the aircraft be equipped with the appropriate airborne equipment to execute back course localizer approaches.
Always (always!) put the localizer inbound front course under the omni-bearing selector (OBS). The OBS setting doesn’t matter to the electronics on a localizer, but this is a good rule as we’ll see a bit further down.
Perhaps you once learned to fly an NDB approach. (If not, it’s okay. I won’t hold it against you. Bear with me as we explore a little instrument-flying history.)
Say we’re coming from the south and we’re on the localizer south course, headed north. We’ll pass MANZA then make the procedure turn, then head back in on final. Let’s say there’s a stiff wind from the west and we’re not very good at making those wind corrections, so we’re east of course.
Now you can see that if you rigorously follow Rule #1 with an HSI, Rule #2 is still true, but we can pretty much ignore it and can absolutely ignore Rule #3. Having followed Rule #1, all we have to do is chase the needle.