Summary: Apple Watch Ultra 3 debuts with Messages via satellite, Emergency SOS via satellite, and Find My via satellite (periodic location pings)—all with end‑to‑end encryption for recent contacts.
Why it matters
For backcountry users and offshore crews, off‑grid messaging turns the watch into a real safety line. With a stated up to 42‑hour battery (72h Low Power), Ultra 3 pushes Apple’s wearable deeper into expedition gear territory.
Key facts
- Satellite services: two‑way text + Tapbacks; periodic location share to pre‑approved contacts.
- Radio: dual‑antenna algorithm boosts weak‑signal areas on‑grid.
- Availability: pre‑order at launch; in stores Sept 19 (regional availability varies).
What to watch
Regional roll‑out of satellite coverage, pricing after the initial free period, and accessory makers adding rugged bands / battery packs aimed at thru‑hikers and sailors.