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Descent X30 Software Version 4.01 rollout

Garmin Kelly

Hello Descent X30 users, 

Today we started the rollout of Software Version 4.01; currently we are at 50% with this rollout and we will increase the % as time goes by. 

Change Log

  1. [IN-DIVE CHANGE] Based on guidance from DAN, the CNS Toxicity accumulation rate has been updated based on the 2025 paper by Hoyt, et. al. to increase the exposure limit for 1.20 - 1.30 PO2.
  2. [IN-DIVE CHANGE] Based on guidance from DAN, the CNS Toxicity alerts have been removed. The data field is still available for users who want to track this value, and it is still available on the Surface Interval widget.
  3. [IN-DIVE CHANGE] Based on guidance from DAN, the OTU limits have been adjusted up substantially, but now account for consecutive days of diving by reducing the limit over time. For example, the first day of diving will warn at 600 OTU with a critical limit at 850 OTU. The daily limit is visible on the Surface Interval Limit.
  4. Adds an indication to pre-check for the last time the compass was calibrated. Remember to calibrate your compass any time you travel.
  5. Prevents logging inaccurate altimeter readings during dive activities
  6. Improves UI when starting, stopping, and saving dive activities