![]() ![]() Code of Federal Regulation (CFR) Part 91 non-precision weather requirements must be used for planning. When using WAAS at an alternate airport, flight planning must be based on flying the RNAV (GPS) LNAV or circling minima line, or minima on a GPS approach procedure, or conventional approach procedure with “or GPS” in the title. (a) Pilots with WAAS receivers may flight plan to use any instrument approach procedure authorized for use with their WAAS avionics as the planned approach at a required alternate, with the following restrictions.(See paragraph 1-1-17 d for more information on equipment requirements.) As such, installation of WAAS avionics does not require the aircraft to have other equipment appropriate to the route to be flown. Unlike TSO-C129 avionics, which were certified as a supplement to other means of navigation, WAAS avionics are evaluated without reliance on other navigation systems. With respect to alternate weather minimums when flight planning based upon WAAS/GPS installations, reference AIM 1-1-18 c.9.(a)ĩ. But even so, it's still legally a nonprecision approach. Also, you can use an LPV as your precision approach on an instrument practical test or instrument proficiency check (IPC) if the DH is 300 or less. ![]() And, of course, just as with any other approach, if you divert to an alternate (filed or not) after missing at your destination, you can fly the approach down to the MDA/DA minimums published for that approach, not just the "600/800-2 or as published" alternate weather requirement. You still fly an LPV using precision technique, that is, you follow the glide slope down to the published DA and then begin executing your missed approach when you reach DA regardless of relationship to the missed approach waypoint (RWxx waypoint) which you'd use if you were flying it in LP or LNAV mode. But the only practical effect of that designation is that if you're using an RNAV(GPS) approach as the approach for designating an airport as your filed alternate, it must be forecasting at least 800-2 even if it has an LPV option. It's not surprising that you are getting "conflicting reports" because the answer is "no, but."įrom a regulatory standpoint, all RNAV(GPS) approaches are nonprecision. ![]()
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