If you're in an emergency situation, cell phones die but if you have a self winding or manual winding watch you won't have that problem. Being able to tell time may actually help you in a survival/ emergency situation if you want to conserve radio batteries but need to keep track of weather, you know what time to turn it on and listen to the weather news and you're not wasting your batteries. Also, you may need to time yourself to give yourself an idea of distance that you're walking each day. (I actually have a pedometer on my phone, but again, if you're out in the wilderness...cell phones die). There are other tactical uses for watches, but I've been out of the military awhile now and I've forgotten some of them, but you should learn them and make sure you have a manual or self winding watch in your BOB or EDC. It could come in quite handy. Oh yeah..and if you've ever had to aid in a search and rescue, They may want everyone to check in at certain times.....or they may need to make announcements at certain times. I've actually been on one of those and at the time I didn't own a cell phone.