Bluetooth Sync — What It Is and Why It Matters
Bluetooth sync is a wireless data transfer feature that allows dive computers to connect to a smartphone or tablet to upload dive logs, update firmware, and adjust computer settings through a companion app. Bluetooth Low Energy (BLE) is the standard protocol used by modern dive computers from Shearwater, Suunto, Garmin, and others.
Syncing typically happens at the surface after a dive — Bluetooth signals do not transmit through water. Most companion apps provide detailed dive profile graphs, statistics tracking over time, and the ability to share dive logs on social platforms or export them in standard formats like UDDF.
Frequently Asked Questions
Does Bluetooth work underwater?
No. Bluetooth radio signals cannot penetrate water. Syncing happens at the surface before or after diving. Your dive computer records all data locally during the dive and transfers it afterward.
Which apps work with dive computer Bluetooth sync?
Each manufacturer has its own companion app — Shearwater Cloud, Suunto App, Garmin Dive, Mares SSA, and so on. Third-party apps like Subsurface can import logs from many brands via cable connection or file export.
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