That is very dependent on the location and SAR Resources available. In Alaska rescue took 24 hours after a bear attack.

You need to activate the system, SAR needs to have a resource in the area, and then the weather has to be good enough to fly, boat, quad to the location. With good luck and weather you might get rescues in 1-day, with Bad luck and bad weather it would be 3 or 4 days. I figure I will spend the night at least until rescue, unless I am very lucky.