Is this egg bad? New to candling

[Tonyroo]

Not all growth happens near the shell for easy candling. Some develop in the center of the egg which only let's you see the ending of veins.

 

[HeidiGetsChicks]

Got a better picture. The air sac is on the side, but I see veins and everything.

 

[New duck mommy 2021]

Got a better picture. The air sac is on the side, but I see veins and everything.

Looks like a detached air cell possibly but I do see veins
I had a few shipped eggs with detached air cells but my whole batch of shipped eggs was a hot mess and the few that did start all died in the first week
We got a nasty cold front that left temps at -10C and there was a delay over a weekend so they eggs sat in a truck in the cold
I’m not much help on how to hatch these kind
However I see veins and veins means life
That’s a great sign