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What's this Symbol/Alert on my Aladdin Computer?

I have an old Alladin pro dive comp, not air inter etc.

I had it serviced a month ago, I was checkin thru my dive log after the weekend diving and up came a dive ive not done.

so i pressume its where its been tested.

however where depth is it reads Adt, dive time 11mts and max depth 42.5 mtrs.

now does anyone know what "Adt" stands for just in case im lucky enough to do a 42 mtr dive

cheers
Steve
 

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Are you sure it is not displaying Atn in the depth section.

If it is Atn, this signifies on a dive that a violation of deco stop or ascent rate occured.  Quite possible in a pressure test, can't imagine they are too fussy on ascent rates  


Daz
 

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Wondering if it has anything to do with altitude decompression times....just a thought.

Cheers.

Graham
 
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