Watches
On exercise the phone stays in the pack or is banned outright. Timekeeping then falls to the field watch on your wrist. A good one is a simple, shock-resistant instrument rather than a fashion piece. Conscripts and hunters alike still wear one.
Check three things. The case should be shock resistant, with mineral or hardened glass. Water resistance of at least 10 ATM survives swimming and mud. The dial must stay readable at night, via backlight or luminous hands. An interchangeable NATO strap matches the watch to your kit in seconds and washes clean. With the sun, an analogue dial even gives rough direction without a compass. Care products keep watch and strap serviceable.
Try the models on your wrist at Kadaka tee 42b in Tallinn. With watches, feel decides.