IFD500 Series Pilot Guide
Aux Subsystem 5-57
FMS CATEGORY
The items in this category are used to control the appearance and
behavior of the FMS.
VNAV
Settings under this heading are used to define the method for
computing the top-of-descent point, which directly affects the
angle used by enroute VNAV (see page 6-37).
Path Basis
This setting defines whether the top-of-descent point is
determined by a specified descent angle or on a descent rate (i.e.
vertical speed). The factory default setting is “Descent Angle”.
Descent Angle
This setting defines the angle to be used when determining the
top-of-descent point. The value can range from 1.0° to 6.0°
degrees. The factory default setting is 4.0°.
Descent Rate
This setting defines the rate of descent to be used when
determining the top-of-descent point. The minimum and
maximum values vary based on the selected Altitude/VS Units
setting, but are based on a range of 50 feet per minute to 2000
feet per minute. The factory default setting is 500 feet per
minute.
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