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GNS 530(A) Pilot’s Guide and Reference
190-00181-00 Rev. G
12-2
SECTION 12
TERRAIN
TERRAIN Alerting
/,, Ê ÕÃiÃÊ vÀ>ÌÊ «ÀÛ`i`Ê vÀÊ Ì iÊ *-Ê
ÀiViÛiÀÊ ÌÊ «ÀÛ`iÊ >Ê
ÀâÌ>Ê «ÃÌÊ >`Ê >ÌÌÕ`i°ÊÊ
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>ÌÌÕ`iÊ ÃÊ VÛiÀÌi`Ê ÌÊ >Ê i>Ê Ãi>Ê iÛiÊ -®L>Ãi`Ê
>ÌÌÕ`iÊ *--Ê >ÌÌÕ`i®Ê >`Ê ÃÊ ÕÃi`Ê ÌÊ `iÌiÀiÊ
/,, Ê>iÀÌðÊÊ*--Ê>ÌÌÕ`iÊ>VVÕÀ>VÞÊÃÊ>vviVÌi`Ê
by factors such as satellite geometry, but it is not subject
to variations in pressure and temperature that normally
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}
ÞÊ
>VVÕÀ>ÌiÊ >`Ê Ài>LiÊ -Ê >ÌÌÕ`iÊ ÃÕÀViÊ ÌÊ V>VÕ>ÌiÊ
terrain and obstacle alerts.
/,, ÊÕÌâiÃÊÌiÀÀ>Ê>`ÊLÃÌ>ViÊ`>Ì>L>ÃiÃÊÌ >ÌÊ
>ÀiÊÀiviÀiVi`ÊÌÊi>ÊÃi>ÊiÛiÊ-®°ÊÊ1Ã}ÊÌ
iÊ*-Ê
«ÃÌÊ>`Ê*--Ê>ÌÌÕ`i]Ê/,, Ê`ë>ÞÃÊ>ÊÓÊ
picture of the surrounding terrain and obstacles relative
to the position and altitude of the aircraft. Furthermore,
Ì
iÊ *-Ê «ÃÌÊ >`Ê *--Ê >ÌÌÕ`iÊ >ÀiÊ ÕÃi`Ê ÌÊ
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iÊ>ÀVÀ>v̽ÃÊy}
ÌÊ«>Ì
ÊÊÀi>ÌÊ
to the surrounding terrain and obstacles. In this manner,
/,, Ê V>Ê «ÀÛ`iÊ >`Û>Vi`Ê >iÀÌÃÊ vÊ «Ài`VÌi`Ê
`>}iÀÕÃÊ ÌiÀÀ>Ê V`ÌÃ°Ê Ê iÌ>i`Ê >iÀÌÊ `iÃÊ >ÀiÊ
described later in this section.
Baro-Corrected Altitude
>ÀVÀÀiVÌi`Ê>ÌÌÕ`iÊÀÊ`V>Ìi`Ê>ÌÌÕ`i®ÊÃÊ`iÀÛi`Ê
by adjusting the altimeter setting for local atmospheric
conditions. The most accurate baro-corrected altitude
can be achieved by frequently updating the altimeter
setting to the nearest reporting station along the flight
«>Ì °Ê Ê ÜiÛiÀ]Ê LiV>ÕÃiÊ >VÌÕ>Ê >Ìë iÀiÊ V`ÌÃÊ
seldom match the standard conditions defined by the
ÌiÀ>Ì>Ê -Ì>`>À`Ê Ìë
iÀiÊ -®Ê `iÊ Ü
iÀiÊ
«ÀiÃÃÕÀi]ÊÌi«iÀ>ÌÕÀi]Ê>`Ê>«ÃiÊÀ>ÌiÃÊ
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ÌÊÃÊVÊvÀÊÌ
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Ì
iÊ>ÌiÌiÀ®ÊÌÊ`vviÀÊvÀÊÌ
iÊ*--Ê>ÌÌÕ`i°ÊÊ/
ÃÊ
variation results in the aircraft’s true altitude differing from
the baro-corrected altitude.
Using TERRAIN
ÕÀ}Ê «ÜiÀÕ«]Ê Ì iÊ ÌiÀÀ>ÉLÃÌ>ViÊ `>Ì>L>ÃiÊ
versions are displayed along with a disclaimer to the pilot.
ÌÊÌ
iÊÃ>iÊÌi]Ê/,, ÊÃivÌiÃÌÊLi}ðÊÊÊÌiÃÌÊv>ÕÀiÊ
ÃÊ>ÕV>Ìi`ÊvÀÊ/,, Ê>ÃÊÃ
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Summary of Contents for GNS 530
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