Garmin GPSMAP 295 - Manual (Page 89)

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MENU The ‘VNAV’ file tab provide settings for the vertical navigation feature. These settings create a three-
dimensional profile which guides you from your present position and altitude to a final (target) altitude
at a specified location.
Once the profile is defined, message alerts and additional data on the HSI Page will keep you
informed of your progress. The user-defined data fields on the HSI Page can display time to beginning
of VNAV maneuver (ETV), glide ratio and vertical speed to target. Expect the following to occur when
using the GPSMAP 295’s VNAV features:
• As you approach the initial descent point, the
time to vertical navigation field (ETV) indi-
cates the time to reach the initial descent point.
• At one minute prior to the initial descent point,
a message ‘Approaching VNAV Profile’ occurs.
The time to vertical navigation will sequence
from indicating time to initial descent point to
indicating time to reach the target altitude.
Finally, the descent angle will lock to prevent
changes in speed from altering the profile.
Keep this in mind, since the VNAV feature will
not take into account any changes in groundspeed that occur during the transistion from level flight to
descent or climb.
• At 500 feet above the target altitude, an ‘Approaching Target Altitude’ message appears. The time
to vertical navigation will go blank and the VNAV indicator will disappear from the HSI Page.
GPS accuracy may be degraded by the U.S. Department of Defense imposed Selective
Availability (SA) program. With ‘SA’ on, GPS altitude may be in error by several hundred
feet. Errors of this magnitude may result in fluctuations in the VNAV indicator on the
HSI Page. The GPSMAP 295 is a VFR navigation tool and should not be used to perform
instrument approaches.
Main Menu: VNAV
When using the vertical navigation features, a VNAV
indicator (moving horizontal bar) will guide you as you
descend to the target altitude.
The ‘VNAV’ settings define the target altitude and where it
should occur. The default settings are intended to guide you
to pattern altitudes.
VNAV PROFILE
GLIDE RATIO TO TARGET
DISTANCE TO TARGET
DISTANCE TO PROFILE
TARGET ALTITUDE
AIRPORT
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