Jim  J - were I on Lake Superior other than very near shore I'd consider a PLB.  Like you, in the Q, I do not worry with a Spot.  (I use second button to say pick me up with intent my location will be obvious where - ep or whatever in case I'm out early or other than where planned - and third one to say - trouble, I can't move or get out myself but not in meed of immediate assistance - which leaves a challenge for my sons (I only send that one to them - my wife would get upsate and sons are very thoughtful and familiar with the area) to decide if they can arrange something or shoud call for emergency services or leave me to hit SOS after no one shows.

Intrepid - I think it auto offs so I just make sure both lights illuminate   and then forget it.  I agree though it would be better if it said "sending" rather than sent, but I just looked and my spot 2 just shows an envelope with a contrail, so less - or more - uncertain as to meaning.