Which GPS Support LNAV/VNAV?

[C Kingsbury]

As I understand the new RNAV approaches support three types of approach:

Lateral-only navigation (Basically the traditional GPS approach?)
LNAV/VNAV
LPV

Now, IIRC, only the LPV approaches *require* WAAS, while the LNAV/VNAV
approaches support use of barometrically-derived *or* WAAS VNAV guidance. I
understand that baro-VNAV is a common function of FMSs, but are there any
panel-mount GPSs out there (beside the CNX-80) which can provide this type
of vertical guidance with the necessary RNP?

swimming in the bowl of new alphabet soup...

-cwk.

[John R. Copeland]

"C Kingsbury" > wrote in message =
ink.net...
> As I understand the new RNAV approaches support three types of =
approach:
>=20
> Lateral-only navigation (Basically the traditional GPS approach?)
> LNAV/VNAV
> LPV
>=20
> Now, IIRC, only the LPV approaches *require* WAAS, while the LNAV/VNAV
> approaches support use of barometrically-derived *or* WAAS VNAV =
guidance. I
> understand that baro-VNAV is a common function of FMSs, but are there =
any
> panel-mount GPSs out there (beside the CNX-80) which can provide this =
type
> of vertical guidance with the necessary RNP?
>=20
> swimming in the bowl of new alphabet soup...
>=20
> -cwk.
>
I'm pretty sure the GNS480 (CNX80 with Software version 2) is the only
GPS panel unit yet certified for VNAV of any kind.
No other such unit yet meets TSO-C146a with its 5/second update rate.

Today I flew my very first LNAV/VNAV approach, but I remained in VMC.
The approach was easier than I expected.
---JRC---