T B M
850
SUPPLEMENT 69
BARO--VNAV APPROACHES
Edition 1 -- September 30, 2018
Rev. 0
Page 9.69.16
The GARMIN Approach Baro--VNAV system is automatically temperature
compensated to produce a glide--path position in space such that
Baro--VNAV approaches are always flown at the published glide path angle
when the actual temperature deviates from the ISA model. This produces
results similar to ILS glideslopes and LPV glide--paths that remain in the
same position in space without respect to temperature.
To produce the correct geometric glide path angle on the final approach
segment, temperature compensation is applied to the barometric altitude
and used to determine the displayed vertical deviation.
However, the altimeter continues to display uncompensated barometric
altitude.
The temperature compensation required depends on the temperature profile
over the altitude range between the point at which the barometric setting is
measured (presumed to be the approach airport) and the present altitude of
the aircraft.
This temperature profile is estimated by using the air data system static air
temperature (SAT) and applying the standard temperature lapse rate to
determine the temperature over the rest of the range.
When using barometric altitude for vertical guidance along the final approach
segment, temperature compensation is applied whether the temperature is
above or below standard temperature. The actual compensated altitude is
not displayed to the pilot during an approach.
Compensating Waypoint Altitudes
Depending on the terrain, temperature compensation may be required for
waypoints in the approach prior to the final approach segment due to terrain
and/or obstacle clearance requirements.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
Summary of Contents for TBM 850
Page 1: ...PILOT S INFORMATION MANUAL TBM 850 Edition 1 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 142: ...3 1 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 146: ...3 2 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 150: ...3 3 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 164: ...3 4 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 170: ...3 5 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 178: ...3 6 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 184: ...3 7 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 196: ...3 8 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 202: ...3 9 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 216: ...3 10 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 228: ...3 11 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 236: ...3 12 PIM DO NOT USE FOR FLIGHT OPERATIONS ...