At one time, when I was in GBR , I tried to use a soft case and noticed that the crushing pressure at 102’ depth was enough to turn on the PLB1 under water. See the red light lit up in the picture below. So you either don’t dive it to that depth with soft case or use a hard case as @Dizzi Lizzi was talking about in her post.
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Yes exactly. Soft case for shallow, hard case for deep.