> 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/tracker-650/getting-started/overview.md).

# Overview

The Tracker 650 is an affordable velocity sensor for ROVs, built to deliver reliable motion tracking relative to nearby surfaces such as the seabed, seawalls, and barge bottoms. It provides velocity and raw sensor data for applications ranging from simple position hold to dead reckoning, advanced navigation, and custom state estimation.

For BlueROV2 users, setup is straightforward: the Tracker 650 is plug-and-play with the flight controller for position hold and navigation. It can also be integrated with different vehicles through light API integration.

Additionally, pairing the Tracker 650 with an [Omnitrack](https://docs.ceruleansonar.com/c/omnitrack/) enables USBL + DVL sensor fusion on BlueROV2 systems.

<figure><img src="/files/3IdMtovirCeC3AdO2g0h" alt="" width="361"><figcaption><p>Tracker 650 V2 Isometric View of sensor face</p></figcaption></figure>

<figure><img src="/files/MzkfjxpCm6oBmwSnL6yD" alt="" width="375"><figcaption><p>Tracker 650 V2 View of sensor face</p></figcaption></figure>

<figure><img src="/files/lsXtsBeHIHiHDFpMYsUI" alt="" width="375"><figcaption><p>Tracker 650 V2 View of backside — Arrow points in "X" direction</p></figcaption></figure>

<figure><img src="/files/1xeIdSstQVLVxN92NPzu" alt="" width="373"><figcaption><p>Tracker 650 V2 Side view</p></figcaption></figure>