So what's the difference? APV approaches don't meet the ICAO and FAA precision approach definitions, which apply mostly to localizer and glideslope transmitters. Instead, they're an approach with vertical guidance (APV). Even though LPV approaches have vertical guidance, they're not considered precision approaches. LPV approaches are a WAAS/GPS based approach, and they're very similar to the ILS.

LPV: Localizer Performance With Vertical Guidance So what's the difference between LPV and LNAV/VNAV approaches? They're both GPS based approaches with vertical guidance, but the similarities end there. With GPS, the number of approaches with vertical guidance has tripled. Over the past several years, the FAA has created GPS based LPV and LNAV/VNAV approaches at thousands of airports across the US. And if you weren't flying an ILS, you were managing step-down altitudes on a non-precision approach. Just remeber to fly the command bars and you'll find that if you fly your departures this way, first you'll be flying it the way most of your airline pilots fly a departure, and it's also the smoothest way to depart in the FS environment.It wasn't that long ago when you only had one kind of approach with vertical guidance: the ILS. Also, if your not being vectored, you may also select the LNAV button any time after passing 1,000ft agl. I never turn on the autopilot, until I'm leveling off at cruise altitude. They will fly you up until your level off altitude. Now continue to fly, using the command bars. Press the execute button, and exit the FMC.ĩ. Pressing the 4L line select key will ulliminate the execute button.Ĩ. Next to the 4L Line Select Key, it will say ECON.

At the altitude that you entered on the CLB page (ours was 6720), bring up the FMC and press the CLB page. At 1000ft agl, lower nose to 10 degrees of pitch(don't follow the horizontal command bar at this time), select VNAV button, and flaps to 1. At 400ft agl, press the HDG select button,to track heading.ĥ. At Vr, rotate to the command bars.(approx 15 degrees)Ĥ. Make sure the FD switch is on and the autothrottle is armed.ģ. You will hand fly the departure through at least 18,000ft.ġ. Upon pressing this button, the execute button will illuminate. Next type 250 into the scratch pad, and press the 2L Line Select Key, for Target Speed. The numbers in the scratch pad will then appear in that line.Ĥ. Once this is in the scratch pad, press the 3L Line Select Key, for speed restriction.

Your line in the scratch pad should look like this: 210/6720. An example of this if you were sitting at Salt Lake City Intl airport would be this: Field elev at KSLC is 4220. Type the following into the scratch pad: you will type in a speed of 210, a forward slash, and an altitude of 2500ft above the field elevation of where you are sitting. Press the CLB funtion key,to access the CLB page.ģ.

Once you have loaded all of your normal preflight items into the FMC, and executed all of the necessary screens, you will then load the following data into the CLB page.Ģ. Second, the way that most 737 pilots fly their departures are as follows:ġ. If you forget to execute a particular screen these problems will happen. First of all, make sure that you execute all of the appropriate screens when the execute light illuminates.

Lnav vs logtail