# Navigation for BlueROV2

**URL:** <https://discuss.bluerobotics.com/t/navigation-for-bluerov2/11047>\
**Category:** BlueROV2\
**Tags:** positioning\
**Created:** [November 22, 2021, 8:33am UTC](https://discuss.bluerobotics.com/t/navigation-for-bluerov2/11047 "2021-11-22T08:33:12Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\
**Post date:** [November 22, 2021, 11:52am UTC](https://discuss.bluerobotics.com/t/navigation-for-bluerov2/11047/2 "2021-11-22T11:52:07Z")

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Hi @moro, welcome to the forum 🙂

> [@moro](#):
>
> How can we set up a robust navigation system for no to minimal cost

I would note that if this was something readily available it would almost certainly come by default on most ROVs. That said, there’s a strong dependence here on your particular operating conditions, and what you consider to be sufficiently robust.

I’d suggest you read [this topic](https://discuss.bluerobotics.com/t/rov-and-auv-localization-an-introduction/519) to get started with understanding underwater positioning technologies. From there it may be relevant to consider the following:

> [@GPS/Positioning equipment](https://discuss.bluerobotics.com/t/gps-positioning-equipment/10960/2):
>
> [This comment](https://discuss.bluerobotics.com/t/dvl-recommendations/10775/2) covers the DVLs with easy BlueROV2 integration, and links to a broader post on understanding underwater positioning as a whole.
> 
> For direct acoustic positioning systems [this thread](https://discuss.bluerobotics.com/t/usbl-systems-comparison/9223) may be of interest 🙂

The systems discussed in those two links are useful to know about but are also all outside your stated budget, so if it’s of interest, the lowest cost options I can think of right now are:

| system | cost | notes |
| --- | --- | --- |
| IMU double-integration | Free (IMU already in ROV | loses significant accuracy within a few meters of motion → generally not feasible) |
| [Standard GPS with antenna](https://discuss.bluerobotics.com/t/gps-trace-somewhere/10823) | can be ~$10 to a few hundred | only works at the surface, may be difficult to integrate well |
| Optical flow/computer vision | camera(s) can be ~$50 to several hundred | only works with good water quality and distinguishable objects, likely requires significant integration development and some potentially expensive processing hardware |
| [Cerulean DVL-75](https://ceruleansonar.com/products/dvl-75) | from $1999 US | max operating height ~40m, max speed 8 knots (~4.1m/s), above your specified budget |

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