How about a satellite IoT solution tied to OpenPlotter?

[mgrouch]

I think it's either the 5th or 6th time in the past few months that people have mentioned the need for a PLB-like device. I even had an artist in Germany ask me for something like this for one of his projects ...

What's the main use case? And why LORA? Care to elaborate?

I think use cases were explained even in post before. 
Dinghy locator. (Example captain stays on the boat but inexperienced guests go on a dinghy to shore
and they coming back at night and not too sober. Common use case.)
Asset tracker. Let me add

LoRa is license free even to transmit. Distances up to 10km or so.
Transmitter is low power can work on batteries for years. 
Low cost. No subscription cost like with other GPS trackers. 

Realistically good for tracking any assets from mother ship as
they do not move away from it too far. LoRa range would cover it.