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IFD540 F500/TWAS |
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2thomas 
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Joined: 29 Jun 2019 Location: ft myers Status: Offline Points: 11 |
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 Topic: IFD540 F500/TWASPosted: 30 Jun 2019 at 11:48am |
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can anybody tell me the difference between F500 and TWAS? When i bought my 540 i was told that TWAS is included. now i see that F500 is activated but not TWAS and they told me it is the same but couldn't explain the difference. thanks thomas
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AviSteve
Admin Group 
Joined: 12 Feb 2018 Location: Melbourne, FL Status: Offline Points: 2310 |
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Posted: 08 Jul 2019 at 11:42am |
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The F500 option is related to the "Forward
Looking Terrain Avoidance" (FLTA) function. In order to provide the
synthetic vision functions (including the exocentric view on the Map page), the
system is required to implement FLTA-like functions. So, that's the
"F" in F500. The "500" is for the 500' AGL callout
feature.
TAWS includes other features over and above F500 such as alerting
for Premature Descent, Excessive Descent Rate, and Negative Climb Rate. The IFD doesn't currently claim the TAWS TSO. Therefore, the TAWS option has not been offered and no IFDs have it enabled. The option shown on the system page is there to support that option once it becomes available. |
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Steve Lindsley
Avidyne Engineering |
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