The Garmin quatix 8 Pro (47mm) is the connected flagship of Garmin's marine smartwatch line, adding LTE cellular calling/messaging and Garmin's inReach satellite communication to the quatix 8's boating-focused feature set — built for mariners who want offshore safety connectivity as well as boat control from their wrist. It uses a 1.4" AMOLED touchscreen under a sapphire lens, in a titanium-bezelled case rated to 10 ATM with a depth gauge to 40m. It integrates inReach satellite technology alongside an LTE cellular module, letting users send messages, make calls and trigger SOS even up to roughly 80km (50 miles) offshore, beyond normal cell coverage (an active inReach subscription is required for satellite/LTE services). It retains the quatix line's marine tools — remote control of compatible Garmin trolling motors and Fusion entertainment systems, live depth/speed/heading/wind data, anchor drag and tide alerts, tack assist and race start guidance — alongside multi-band GPS, the Elevate Gen 5 heart rate sensor with ECG, Pulse Ox, and Garmin Pay. Battery life runs up to 15 days in smartwatch mode, up to 44 hours in GPS-only mode, dropping to around 8 hours with multi-band GPS, music and LTE all running together; an Expedition mode extends satellite-only use to around 30 days. This is the choice for offshore sailors and anglers who specifically want built-in emergency/offshore connectivity; the standard quatix 8 covers coastal and inshore use at a lower price with no subscription.