How do I find out my oxygen level in Elite Dangerous?

I have not played in a few months but when I last played the only time the countdown timer appears is when your cockpit is shattered or your life support is turned off or disabled.

The Life Support module is capable of keeping your ship full of breathable air so long as it has power and there is no compromise in containment (e.g.: breach of Cockpit Canopy). So, under most conditions, you should not need to worry about how much oxygen you have.

However, there are of course situations where your reserve oxygen does come into play.

When Reserve Oxygen is Important

Breach of Cockpit Canopy or Destruction of Life Support Module

This generally only happens during combat, if the enemy has been especially diligent in focusing fire on the Cockpit Canopy or Life Support. However, it could possibly occur during other mishaps involving collisions with environmental objects.

If either of these modules fail, your reserve oxygen will be gradually depleted until you either enter an area with a breathable atmosphere (e.g.: interior of a large station) or repair the compromised module(s).

Your Cockpit Canopy must be repaired at a facility. For Life Support, you may be able to use the Reboot/Repair function (under the Functions section of the right-side panel in your cockpit) to get it back up and running. This may take several attempts.

Life Support Module Disabled

There are a few ways this can happen. Most of them are self-recoverable, but some are not. Until you get Life Support turned back on, your reserve oxygen will slowly be depleted.

1. Disabled manually in the Modules panel.
   Really, what were you thinking? Turn it back on!

2. Disabled automatically due to power management settings and low power conditions.
   Best way to avoid this is by keeping Life Support at Priority 1 and set everything else separate. However, if you do encounter this issue, you generally have two options.

   • Increase the priority setting for Life Support (make the number lower) until it turns on. If Life Support is already at Priority 1 and it still isn't coming on, or you have your own reasons for not making it the top priority, move to the next step.
   • Retract Hardpoints and/or disable other modules until Life Support turns on.

3. Disabled due to fuel shortage.
   In cases of extreme fuel shortage, all of your ship's modules will shut down. You will be left stranded in space, able to do practically nothing, unless someone comes by to refuel you. Fortunately, we have the Fuel Rats for just a situation. If your fuel is completely out, and your Life Support timer has started, make note of your location and exit the game immediately. Then, follow the instructions on the Fuel Rats website to get help.

Finding Out How Much Reserve Oxygen You Have

The amount of reserve oxygen you have available is affected by two things:

1. The quality of Life Support module you have installed.
   You can see this in the Modules section of the right-side panel in your cockpit. On the Life Support line, there should be a number indicating the size of the module (which will be standard for your ship) and a letter indicating the class. Below are the Life Support module classes, and the amount of reserve oxygen available for each - this is the same regardless of what size module you have.

   • A: 25 minutes
   • B: 15 minutes
   • C: 10 minutes
   • D: 7.5 minutes
   • E: 5 minutes

2. How much reserve oxygen you've used since you last docked.
   Every time you dock, your reserve oxygen is refilled. This is the only time your reserve oxygen refills. If you haven't encountered any of the situations listed in "When Reserve Oxygen is Important" since the last time you docked, then you should have the maximum capacity of your Life Support module (listed above) remaining. If you're not sure, the only way to tell is to manually disable Life Support and observe the timer - of course, this will use up a few seconds of reserve oxygen (until you turn Life Support back on) in the process.