Final answer:
When using WAAS equipment, you can plan for LPV and LNAV/VNAV instrument approach procedures at the required alternate, provided they are available and comply with any restrictions indicated in NOTAMs or approach plates.
Step-by-step explanation:
The instrument approach procedures you may plan to use as the planned approach at the required alternate when using WAAS equipment primarily include LPV (Localizer Performance with Vertical Guidance) and LNAV/VNAV (Lateral Navigation/Vertical Navigation) approaches. When WAAS is available, it offers satellite-based navigation with enhanced precision, allowing for approaches with GPS that are similar to ILS (Instrument Landing System) approaches without requiring traditional ground-based navigational aids. Not all airports have WAAS-enabled procedures, so it's crucial to verify their availability during flight planning. When selecting an alternate airport, it is also essential to adhere to any limitations or requirements stated in the NOTAMs (Notices to Airmen) or the approach plates for those airfields.