# Using current meters to localize a rov **URL:** \ **Category:** General Discussion\ **Created:** [May 25, 2017, 5:55am UTC](https://discuss.bluerobotics.com/t/using-current-meters-to-localize-a-rov/1107 "2017-05-25T05:55:32Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![Pierson](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/pierson/32/1101_2.png) [@Pierson](https://discuss.bluerobotics.com/u/Pierson)\ **Post date:** [May 26, 2017, 5:43am UTC](https://discuss.bluerobotics.com/t/using-current-meters-to-localize-a-rov/1107/5 "2017-05-26T05:43:45Z")
Hey, so physics tell us that we can’t use current sensors to localize an ROV because it only tells you relative current. So if the rov is being displaced by a current, then that component of current velocity is not measured on the vehicle. Below is a good write up on the techniques for localization that are commonly used and attempted. Perhaps I should append it to include why current sensors don’t work. > [@ROV and AUV Localization an Introduction](http://discuss.bluerobotics.com/t/rov-and-auv-localization-an-introduction/519): > > Hey Blue Robotics Community! Relatively frequently I see people asking about, hovering, dead reckoning, and using GPS or IMUs for localization. This is often enough I think perhaps it would be useful to have a small guide on localizing underwater vehicles. This a first draft and should be considered an introductory guide. Any comments, criticisms, or things that I left off are welcomed and appreciated. Why is localization a problem for underwater vehicles? In the field of in air robotics, lo… --- _[View the full topic](https://discuss.bluerobotics.com/t/using-current-meters-to-localize-a-rov/1107)._