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Thirst

# Thirst


The player has a Hydration (Thirst) metric which starts at 100% and decreases as time passes in the game.  It's displayed in the bottom right corner, under the Hunger metric, and is represented by a blue mug.  When the Hydration metric reaches 0% then the Health metric will start to fall.  The player will slowly heal again if Hydration is restored to above 0%.

It takes 1L of [Water](/wiki/water) to replenish the Hydration level to 100%, which is 2/3 of a [Water Bottle](/wiki/water-bottle).

1L of water is ~55.6 mol of [H2O](/wiki/water).

The rate at which the Hydration metric drains from 100% to 0% depends on body (lung?) temperature and difficulty level (this is all based on a hunger/thirst rate in settings of 1.0):

| Body Temperature | Easy | Normal | Stationeer |
|---|---|---|---|
| 0C | 69.4 min | 34.7 min | 19.8 min |
| 10C | 34.7 min | 23.1 min | 15.4 min |
| 20C | 23.1 min | 17.4 min | 12.6 min |
| 30C | 17.4 min | 13.9 min | 10.7 min |

Since 100% Hydration is 55.6 mol, this can also be expressed as [H2O](/wiki/water) mol per minute:

| Body Temperature | Easy | Normal | Stationeer |
|---|---|---|---|
| 0C | 0.8 mol/min | 1.6 mol/min | 2.8 mol/min |
| 10C | 1.6 mol/min | 2.4 mol/min | 3.6 mol/min |
| 20C | 2.4 mol/min | 3.2 mol/min | 4.4 mol/min |
| 30C | 3.2 mol/min | 4.0 mol/min | 5.2 mol/min |

In theory you will consume less Hydration if you can lower your body (lung?) temperature to less than 0C, but your suit won't allow you to do this.  On easy difficulty, if you were to reduce your temperature to near -10C, you would nearly stop water consumption, but your lungs will start to take damage at -10C.