I've learned a little bit more:
1) The 50' Searay traveled less than 100' before grounding on shore. (Some of that distance was "in flight").
There would have been a sudden stop--without airbags.
(So expect injuries).
2) I was shown a photo of the getaway boat. It was photographed by flashlight, but three occupants can be seen:
one especially clearly.
Because of the "on going" investigation, I shouldn't disclose anything further.