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--- courses:206a:gps [2019/01/11 14:47]
evan created
+++ courses:206a:gps [2019/04/26 15:15] (current)
evan
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 Approach Mode - 0.3NM
+<note tip>AIM 5-4-5: Most RNAV approaches include a VDP. The VDP is only applicable to aircraft using LP or LNAV minima, not LPV or LNAV/VNAV minimums.</note>
+===== GBAS - Ground Based Augmentation System =====
+Ground-Based Augmentation Systems (GBAS) require no additional action on the part of the pilot other than those actions associated with instrument approach procedures. GBAS consists of ground-based equipment in the vicinity of airports that provides additional accuracy and integrity for aircraft GPS systems. This added accuracy allows for more precise GPS approaches.
+GBAS only supports approaches down to Category I approach minima. The FAA intends to bolster GBAS capabilities across the country and provide Category III approach capabilities.
+====== GPS Approach Minimums ======
+===== LPV - Localizer Performance with Vertical Guidance =====
+Uses WAAS to act like an ILS. Sensitivities change as the aircraft gets lower. Aircraft must be certified for LPV approaches (statement in flight manual or supplement).
+===== LNAV/VNAV =====
+Usually provided by Baro-VNAV. Internally generated glidepath.
+===== LNAV =====
+Lateral only. No WAAS required.

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