Device functionality during SOS

Thanks for info, but it doesn't really address SOS functionality.  I employ a similar strategy to what you use.  I use the cheapest plan and rely heavily on Preset Messages.  I use InReach Tracking only when on unfamiliar or known hazardous trails, so only once or twice a year.  I consider it a backup to the SOS message, in the event I can't physically initiate an SOS or I am in an area without a clear view of the sky.

The problem with location requests is that  it is two way communication (a transmitted request followed by a transmitted response), while Tracking is one way (transmitted data).  A location request is only addressed by the device when the device checks for mail, which could be once per hour. I want my Mapshare "safety partner" to easily see when my progress on the trail has changed dramatically, and I think that's best done through tracking.  Cheap insurance.