Use Find My Friends
Emergency SOS will allow specific contacts to get your location in the event of an actual serious emergency, but the feature basically has to be accompanied by at least an attempt to call emergency services (i.e. 911), and of course you actually have to be conscious in order to do that.
Although many view Apple’s Find My Friends app as a more social app, it can also be invaluable for helping keep family members safe by ensuring that everybody knows where everybody is, and it’s already helped to save at least one kidnapping victim.
Those who are more privacy conscious can use Find My Friends more selectively, such as when travelling or going out on the town for a night; the Find My Friends app allows locations to be shared temporarily for limited time periods that automatically expire.