> For the complete documentation index, see [llms.txt](https://agopengps.gitbook.io/agopengps/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://agopengps.gitbook.io/agopengps/starters-guide/what-to-buy/choosing-an-antenna.md).

# Choosing an antenna

While Ardusimple offer such things as "calibrated" antennas for survey, you don't really need them. You have a choice to go either single, single with an IMU (we'll explain that later) or dual - and these antennas will work just fine.

![](https://3465273321-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FCxrMzODBmZ5EhBFy0GTp%2Fuploads%2Fgit-blob-c6937b006d074c40332898b3a1fdc97afb3a1e7b%2Fimage%20\(2\).png?alt=media)

{% embed url="<https://www.ardusimple.com/product/ann-mb-00-ip67/>" %}

Being not-bright-green-and-yellow, they hide on the roof of your machine really well. And they're that cheap, they're not even worth stealing. Can't quite say the same about your FireStarters, eh...!