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Garmin G1000 Cockpit Reference Guide for the Columbia 350/400
2-4
SECTION 2
FLIGHT INSTRUMENTS
2.3 ALTIMETER
Selected Altitude
Box
Altitude Trend
Vector
Current Altitude
Barometric Setting
Box
Figure 2-7 Altimeter
Altitude Select Bug
Altitude Select Bug
The Altitude Select Bug is displayed at the selected
altitude or, if the selected altitude is beyond the altitudes
currently displayed, the bug is displayed at the top or
bottom of the display (whichever is closest to the selected
altitude).
Set the Selected Altitude Bug:
Turn the
ALT
Knobs to set the Altitude Select
Bug. The
small ALT
Knob sets the hundreds and
the
large ALT
Knob sets the thousands. This
altitude also appears in the Selected Altitude
Box above the Altimeter.
Altitude Trend Vector
The end of the trend vector displays approximately
what the altitude will be in 6 seconds if the current rate of
vertical speed is maintained.
Barometric Setting Box
To set barometric pressure, turn the BARO Knob to
select the desired setting.
Altitude Alerting
Figure 2-8 Altitude Alerting Visual Annunciations
Within 1000 ft
Within 200 ft
Deviation of ±200 ft
Visual annunciations appear in the Selected Altitude
Box. Whenever the Selected Altitude is changed,
the Altitude Alerter is reset. The Altitude Alerter is
independent of the Automatic Flight Control System.
An aural tone is heard when the aircraft is within 200
feet of acquiring the selected altitude or when deviating
beyond 200 feet of the acquired selected altitude.
Barometric Minimum Descent Altitude
The desired barometric minimum descent altitude
(MDA, or Decision Height, DH) can be set in the Timer/
References Window.
Visual annunciations alert the pilot when approaching
the MDA:
• When the aircraft altitude descends to within 2500
feet of the MDA setting, the Barometric Minimum
Box appears with the altitude in light blue text.
The bug appears on the tape in light blue once in
range.
• When the aircraft passes through 100 feet of the
MDA, the bug and text turn white.
• Once the aircraft descends past the MDA, the bug
and text turn yellow and the aural alert, “Minimums
Minimums”, is generated.
Alerting is inhibited while the aircraft is on the ground.
If the aircraft climbs after having reached the MDA, once it
reaches 50 feet above the MDA, alerting is disabled.