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One difference I have not seen mentioned is how the VFR GPS appears in
the scan and relates to the other instruments. I know having a permanently mounted, cable free installation where everything is always where it's supposed to be makes a difference in the usability of an instrument. This is one reason why I don't think we will ever see IFR certified handhelds. The installation is part of the certification. |
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Doug wrote:
One difference I have not seen mentioned is how the VFR GPS appears in the scan and relates to the other instruments. I know having a permanently mounted, cable free installation where everything is always where it's supposed to be makes a difference in the usability of an instrument. This is one reason why I don't think we will ever see IFR certified handhelds. The installation is part of the certification. The TSO for IFR certification of the avionics and the installation requires RAIM, auto CDI scaling, panel mount, display on the CDI or HSI in the primary field of view (your point), demonstration that other installed avionics will not interfere with the performance of the GPS avionics, and a switch to select conventional nav or GPS to the primary display. A hand-held does none of the above. ;-) |
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