# 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.

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The 1:1 case is supported by CeruleanTracker and CeruleanMap software. Additionally, users can write their own software to make of of the positional information created.
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<figure><img src="https://2180742755-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTLwTkS60mCJ7pYKVd2G5%2Fuploads%2FoQFELcsl8On9r34EMESR%2Fimage.png?alt=media&#x26;token=6ac9aab0-1ce3-40ea-8f25-6f2b8861a4f8" alt=""><figcaption><p>Canonical Case: One receiver tracking one transmitter on an ROV</p></figcaption></figure>