Operating Instructions
Page 63
Doc. 15301-RevB (2023-11-24)
Behavior on Dead battery
Settings
All settings are retained permanently� No loss of
settings occurs if the battery dies�
Clock
The clock (time and date) data will be lost if the Tern
experiences a total loss of power�
Once the battery is charged, you will need to update
the Clock and Date in the Settings > Watch Menu�
The Tern uses a highly accurate quartz crystal for time
keeping� Expected drift is about 1 minute per month� If
you notice drift, it is easily corrected in the Settings >
Watch menu�
Decompression tissue loading
If the battery dies between repetitive dives the
decompression tissue loading will be lost�
Plan repetitive diving accordingly�
When deco tissues are reset, the following are also
reset:
• Inert gas tissue loadings set to saturated with air
at current atmospheric pressure
• CNS Oxygen Toxicity set to 0%
• Surface Interval time set to 0
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