Has anyone else observed the sparking and timed it to assess damage?

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Brag, I find this a really good reminder when restarting. Especially as I like to tangle with the enemy up close.
U179 went down this way. Previously damaged by aircraft in early mission, a month later when almost home I had to evade 3 DDs . Nicely done, but a little more damage. Boof!

at 245m while drifting down. I have the damage % turned off, so life can be a little exciting at times. The crew looked VERY nervous right before U179 imploded