I guess no word on today's efforts?
Speaking as a person who has spent a week in a cave (involuntarily)- ever since there has always been a place for extra fuel and food in my pack.
It is now a mental game; it is their will to live, their faith, and their ability to keep their thoughts active. Especially the fellow who is alone. I sure hope I am wrong but he must have been hurt pretty bad for his partners to leave him. I am absolutely sure it was a decision of last resort to split up. 3 people keep a cave allot warmer than 1. I am hopeful that he just has a nasty broken bone.
As for the high tech stuff, I never have and NEVER will depend on such devices, yes they are convenient and are handy, but they should NEVER be considered essential, what is essential is good decision and technical skills, which these 3 apparently have.
To the families of these 3, have confidence in the mountaineers abilities and physical/mental toughness they will be down in a couple of days and will have some stories to tell, they will be totally surprised at the national exposure that this adventure has created. I assure you that each of the climbers has their loved ones squarely in their thoughts right now. They will not know what day of the week it is when they are found.
Edited for spelling only, sometimes my mind just runs fasten than my fingers.