> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/ethernet-rov-locator/multi-unit-operation-swarms/multi-unit-1-1.md).

# Multi-Unit 1:1

The 1:1 case is not actually a multi-unit case. It is the basic configuration for which the ROVL was designed. All ROVL units can operate in a 1:1 configuration. If a topside GPS is also used, the absolute position of the ROV or diver can be determined.

{% hint style="info" %}
The 1:1 case is supported by all Cerulean software. Additionally, users can write their own software to make of of the positional information created.
{% endhint %}

<figure><img src="/files/ac1ZLaElB2sDmNbm56QL" alt=""><figcaption><p>Canonical Case: One receiver tracking one transmitter on an ROV</p></figcaption></figure>