DNS is one of those parts of War Thunder that the game introduces once and never revisits.

Short answer

Short version — it is exactly what it looks like, and the confusion comes from a similarly named thing nearby.

  • Check which version of War Thunder any discussion of it is describing.
  • Do not build a plan around it before you have seen it work.
  • Write down what you changed, so you can undo exactly one thing if it goes sideways.

War Thunder models more of the vehicle than it tells you about, and the grind punishes guessing. The name is descriptive if you already know what it does, and opaque if you do not. It is the kind of thing veterans forget they ever had to learn.

What it is

Most of the disagreement you will find online is two people describing different builds. There is a persistent myth attached to it that has never been true in any version. It rewards understanding rather than grinding, which is unusual for War Thunder. Nothing here assumes a particular playstyle beyond wanting the thing to work.

The in-game description is technically accurate and practically useless. Early impressions of it are usually wrong in the same specific way. The short version is near the top on purpose; the reasoning is there if you want to know why.

Common misunderstandings

It is more consequential in the late game than the early one, which is why first impressions mislead. The game introduces it quickly and assumes you picked it up, which is where the confusion starts. Treat anything stated without a version number as provisional.

  • It rewards attention rather than preparation.
  • Ask what it is for before asking how to get it.
  • Prefer the in-game option over an external tool when both exist.
  • Expect its role to have shifted at least once across updates.
  • Ignore the myth attached to it; it has never held up.

What it is often confused with

Its role has changed across updates, so older discussion describes something slightly different. It appears in supplementary material in more detail than it does in the game itself. Patch notes move numbers around constantly; the shape of the answer holds even when a specific value shifts. Two similarly named things exist, and mixing them up explains a lot of contradictory advice.

Its practical value is narrow and real, rather than broad and theoretical. Everything below is framed around the current state of War Thunder rather than a launch-week impression. It shows up in more places than its introduction suggests, once you know to look.

Why people keep asking about it

Whether it is worth going out of your way for depends entirely on how you are playing. The developers have changed their mind about this at least once, which explains the older advice. Community shorthand around it has drifted far enough from the original meaning to cause arguments.

Most guides mention it in passing and none of them stop to define it. What follows assumes you are on a current install and have not modified it. The wiki entry is thorough and buries the actually useful part six paragraphs down.

How it connects to the rest of War Thunder

Knowing this does not make you better at War Thunder, but it does make the rest of it legible. Half the pages on this topic were written for a build that no longer exists, which is why they stop matching what you see. It became noticeably more relevant after a change the patch notes barely mentioned.

Where people go wrong

  • Downloading a helper tool for something the game already does in its own menu.
  • Treating a rare edge case as the normal behaviour and planning around it.
  • Changing five things at once and then not knowing which one helped.

War Thunder FAQ

What if none of this works for me?

Then something in your setup differs from the assumption — version, region or platform. Check those three before anything else.

Where can I read more?

The official material covers it in more depth than the game does, and considerably more reliably than aggregated fan pages.

Why do other guides describe this differently?

Most were written for an earlier version and never revisited. Compare the steps against what your build actually shows.

Does this work the same on console and PC?

The logic is identical. Menu paths and button prompts differ, and any real difference is flagged above.

If you only take one thing from this: the answer near the top is the part that matters, the rest is context.