Only 5 channels, easy to scan. Most MURS used as business frequencies so if they would have an emergency, I think they would be talking on whatever frequency that had been operating on.
Most mobile to base, so a contact would always be there, I would think. Not like cb with channel 9 or FRS, don't think FRS has one. Most FRS is such sort range you could wave at each other for an emergency. I guess maritime has a emergency channel, I think its channel 16.