Garmin GTN 725 Pilot's Manual page 541

19.4 Glove Qualification Procedure
This procedure is used to qualify a specific glove for use with the GTN system
by guiding the user through a variety of tasks that use the touchscreen. Due to
differences in finger size, glove size, and touchscreens between the 6XX or 7XX
unit, the qualification granted by this procedure is specific to the pilot/glove and
6XX or 7XX combination. GTN 7XX and 6XX units must be evaluated separately.
The GTN touchscreen uses capacitive touch technology to sense the proximity
of skin to the display. A glove increases the distance between skin and the display
glass and may reduce the ability of the GTN to detect touches. Therefore, when
selecting a glove for use with the GTN, thinner gloves tend to work better than
thicker gloves. Leather gloves and gloves designed to work specifically with
capacitive touchscreen devices are often found to be acceptable. Additionally,
altering your touch technique to use the pad of your finger to touch the unit
rather than the tip will increase the touchscreen sensitivity while using gloves.
This qualification must be completed on the ground. Performing this
procedure in flight is not authorized. Table 19-1 contains tasks that are required
to qualify a glove. Table 19-2 contains tasks that are not required to qualify a
glove, but may limit the manner in which some functions are accessed while a
glove is worn.
1. Sit in the pilot's seat.
2. Start the GTN in Demo mode by pressing and holding the Direct To key during
power up.
3. Perform the tasks listed in Table 19-1 and Table 19-2 with an non-gloved hand.
You do not need to record any results for this step.
4. Perform the tasks listed in Table 19-1 and Table 19-2 with a gloved hand. For
each task, determine whether the operation is the same or worse as it was
without the glove. Record the results in Table 19-1 and Table 19-2. Items that
may cause the operation to be worse include, but are not limited to:
a. Multiple attempts to select a key
b. Unintentional selection of adjacent keys
c. Excessive force on the touchscreen to select a key
5. If all applicable tasks in Table 19-1 respond in the same way with and without
a glove then the glove used to complete these tasks may be used by the pilot
190-01007-03 Rev. D Garmin GTN 725/750 Pilot's Guide
Foreword
Getting
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Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Charts
Wpt Info
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Appendix
19-17
Index