TDC-3 firmware, manual and Dive Log manager

Current TDC-3 firmware is v3.23 (June 2021).
To update the TDC-3, select Menu-> System-> Program-> Update Chk. Logon to a Wifi, or tether through your phone, and get the latest firmware versions automatically.

Download the TDC-3 user manualpdf user manual

Download the TDC-3 Dive Log manager: Windows 32/64, or Mac OSX 10.10+