D3 Pilot’s Guide 3-1
3. PRODUCT LIMITATIONS
The D3 Pocket Panel is a portable device that aids situational awareness. As the D3 does not have
TSO authorization from the FAA or other regulatory body, it can not be used to replace any
required flight instruments in type certificated aircraft.
The D3’s Ground Speed, Altitude, Vertical Speed, and Ground Track (direction) instruments are
GPS-derived. Their indications WILL BE DIFFERENT from the airspeed, altimeter, VSI, and heading
instruments in your aircraft panel. The D3’s GPS-based indications should not be considered
replacements for any of these primary aircraft instruments. Details about each of these
differences are described in the Product Tour section of this guide.
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