Larger than a localizer
Larger than an ILS
Close to a localizer
Close to an ILS
As good as an ILS
Any onboard computer-generated glideslope requires WAAS, except for those GPS units certified with baro-VNAV, which will allow descent to LNAV/VNAV minimums.
LNAV/VNAV identifies APV minimums developed to accommodate an RNAV IAP with vertical guidance, but with lateral and vertical integrity limits larger than a precision approach or LPV. (AIM 5-4-5)
Note: FAA regulations could change at any time. Please refer to current FARs to ensure you are legal.