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  #11  
Old 11-21-2019, 07:38 PM
rocketman1988 rocketman1988 is offline
 
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I did not note the Canada location but I thought it might be educational to post the FAA section as I had the same question...

I am not planning on a whiskey compass...unless the DAR requires it...
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  #12  
Old 11-21-2019, 07:47 PM
noelf noelf is offline
 
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Did a walk through on a Gulfstream G 550. There is no wet compass. What they do have is a solid state separate compass that is independent of the rest of the glass displays.
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  #13  
Old 11-22-2019, 08:51 AM
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Snowflake Snowflake is offline
 
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The wording in the CARs:
Quote:
Power-driven Aircraft — Day VFR
605.14 No person shall conduct a take-off in a power-driven aircraft for the purpose of day VFR flight unless it is equipped with
...
(d) a magnetic compass or a magnetic direction indicator that operates independently of the aircraft electrical generating system;
...
I have a Dynon D10A with internal backup battery. In the event of a failure of the generating system, it still operates, therefore it is independent of the aircraft electrical generating system. Ergo, I have no wet compass.
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Last edited by Snowflake : 11-22-2019 at 09:00 AM.
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  #14  
Old 11-22-2019, 10:04 AM
Ron B. Ron B. is offline
 
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What about a Skyview along with it's back up battery ?
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  #15  
Old 11-22-2019, 10:15 AM
Mousse Mousse is offline
 
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Quote:
Originally Posted by Ron B. View Post
What about a Skyview along with it's back up battery ?
Your should be OK. You meet CAR 605.14(d). MDRA inspector would not accept this on my -9 but after consulting with TC, he had no choice to accept it. MDRA cannot be more restrictive than the CARs.

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  #16  
Old 11-22-2019, 01:41 PM
Ron B. Ron B. is offline
 
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Wish I would have known this. Thanks.
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  #17  
Old 11-22-2019, 02:20 PM
kmbusse kmbusse is offline
 
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Thanks for that
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  #18  
Old 11-22-2019, 03:58 PM
Jpm757 Jpm757 is offline
 
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There are a variety of compass apps available for download to your phone. They are quite accurate, would be useful in a pinch.
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  #19  
Old 11-23-2019, 11:01 AM
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Snowflake Snowflake is offline
 
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Further info on this... The MD-RA site now has a PDF outlining compass requirements, that doesn't outright say that you can't use an EFIS instead of a whiskey ball.

http://www.md-ra.com/docs/C70E.pdf
(this is on the "Articles of Interest" page, bottom of the first section)

Where the regulations still fall behind with the times is that even though you have an EFIS-based compass, that once calibrated doesn't have deviations, you still need a compass deviation card.

At least, once I calibrated my D10A, I could put my nose on any axis of the compass rose and the reading was +/- 1-2 degrees, which was certainly no less accurate than my placement on the compass rose.
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