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GTN 725/750 Cockpit Reference Guide
190-01007-04 Rev. K
Glove Qualification P
rocedur
e
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. “Tests Required for Glove Qualification” table
contains tasks that are required to qualify a glove. “Test Not Required for Glove
Qualification” table 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 the following sections with an ungloved hand.
You do not need to record any results for this step.
4. Perform the tasks listed in the following sections 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 the applicable table. 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 following sections respond in the same way with
and without a glove then the glove used to complete these tasks may be
used by the pilot who performed this evaluation on the unit (6XX or 7XX)
that was used during this procedure.
