by J G Parker » Wed Jul 09, 2003 8:43 pm
You can pull in ATIS as far out as 60 miles in most cases. That will give you the active. I put the ATIS frequency into COM2 (and turn on COM 2 in the radio stack of my Garmin 530) and keep contact with Center and Flight Following on COM 1 (not all a/c have 2 com radios). COM 2 will be silent for a while but will suddenly light up when I hit its range and begin indicating the active. I select an approach to the active on my GARMIN (or from approach plates from Clearance Unlimited's website) and begin following the approach. Normally, I still won't see the airport in the ATC menu until 10-20 miles out (almost too late, as u pointed out, if you want to be lined up for the active ILS and don't already know it), but I am already inbound anyways and I then I just request a full stop. They seem to 'know' my approach, and just give me the final instructions and, at the FAF, clearance to land. Things at non-towered airports are simpler of course.
One thing to factor in is the ILS/FAF intercept height and plan ahead so you have time to descend. I use STARS from Clearance Unlimited site if available and they include arrival routes and heights. The Garmin provides arrivals too, but they don't have vertical guidance like plates do. I use FS Nav also and it gives obstacle heights along the flight plan, but I have found they can be off. Last nite I made an approach from Las vegas to San Diego without looking at a real plate. When I planned my route in FSNAv it appeared that the highest point anywhere near this segment of the of my flight plan was 4500. I had leveled off at 6500 and was working on setting up my approach when I noticed the outline of the side of a mountain looming ahead (it was dark outside) and my ground radar said I was only 500 feet above ground level. I had to pull up to clear. Spilled the virtual coffee and wet the virtual pants.