DR's preliminary review is probably the best available at this point, but I do have a couple comments.
I have a ResQLink PLB in my flight bag wearing a float coat. When my new Switlik vest arrives (tomorrow??) it will have a separate Molle cellphone pocket for the ResQLink so it should be very easy to access. That said, to activate it, the float coat needs to come off so the PLB will still be tied onto the vest.
For carry in dry places, check out cell phone cases from Maxpedition or elsewhere. It's about that size.
I like the ergonomics. The antenna wraps around the case and covers the activation switch. Looks like a well thought out, mature design -- an evolutionary downsizing of previous ACR PLB's.
$.02
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Better is the Enemy of Good Enough.
Okay, what’s your point??