In one case, an approach labeled such as (GNSS) VOR RWY XX – otherwise known as a GPS Overlay Approach – a traditional VOR or NDB-based approach which has been approved to be flown using the guidance of an IFR-certified GPS (LOC and LOC/BC are not approved for overlays). WAAS may provide vertical guidance during the approach but it is important to recognize that this guidance is ADVISORY only. They can be flown using any IFR-certified GPS or WAAS-augmented GPS. ![]() RNAV and Overlay Approaches with Lateral Guidance OnlyĪ LNAV approach can be considered as a regular Non-Precision Approach. It does not provide or define any vertical path but instead must be flown using the step-down altitudes using a regular barometric altimeter. Some aircrafts use multi-sensor FMS+, but were rarely found in General Aviation until the recent marketing of glass cockpits. There are two main modes of vertical guidance: BARO VNAV or WAAS-augmentation (Class 2/3). This is where it becomes extremely important for you to know exactly what equipment is available to you and what it allows you to do when used for approach purposes. However, they also bring in a completely new dimension that pilot must understand fully. Vertical Guidance – Benefits and ConstraintsĪpproaches with vertical navigation or guidance offer many safety benefits, including a more stabilized approach and higher success rates. Pilot-made waypoints are only acceptable en-route. All approach waypoints MUST be retreived from the database. NOTE: When you are planning to execute an RNAV or Overlay approach, always ensure that your GPS IFR database is up to date.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |