# Can I use cerulean ROV Locator for auto mode? **URL:** \ **Category:** Third Party Products\ **Created:** [October 23, 2024, 6:53am UTC](https://discuss.bluerobotics.com/t/can-i-use-cerulean-rov-locator-for-auto-mode/18348 "2024-10-23T06:53:25Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![K-mura](https://avatars.discourse-cdn.com/v4/letter/k/839c29/32.png) [@K-mura](https://discuss.bluerobotics.com/u/K-mura)\ **Post date:** [October 23, 2024, 6:53am UTC](https://discuss.bluerobotics.com/t/can-i-use-cerulean-rov-locator-for-auto-mode/18348/1 "2024-10-23T06:53:26Z")
Hello, I am looking to build an AUV that will run ardusub auto mission with ceruleansoner’s ROV Locator Mk II. is auto mode or guide mode available with ROV Locator Mk II? Any advice would be appreciated. ---
**Author:** ![tony-white](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/tony-white/32/18385_2.png) [@tony-white](https://discuss.bluerobotics.com/u/tony-white)\ **Post date:** [October 23, 2024, 1:17pm UTC](https://discuss.bluerobotics.com/t/can-i-use-cerulean-rov-locator-for-auto-mode/18348/2 "2024-10-23T13:17:32Z")
Hi @K-mura - If ArduSub is receiving a location from the ROVL, then auto mode can indeed be used. You will need to configure the Cerulean Tracker software (Windows only) to send the position to the vehicle via NMEA. You can then: Go to the autopilot firmware page in BlueOS, and set SERIAL2 to udpin:[0.0.0.0:27000](http://0.0.0.0:27000/) ![image](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/2/2f1b43d3777d5d932736e9146320472185b5278e.png) set the parameter SERIAL2\_PROTOCOL to GPS set the parameter GPS\_TYPE to NMEA Restart the autopilot Finally, you may need to enter in the latitude and longitude of your ROVL topside receiver, or connect a USB GPS and configure it in Cerulean Tracker. If you have issues, please [reach out to Cerulean for assistance!](https://ceruleansonarhelp.zendesk.com/hc/en-us/requests/new) ---
**Author:** ![tony-white](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/tony-white/32/18385_2.png) [@tony-white](https://discuss.bluerobotics.com/u/tony-white)\ **Post date:** [October 24, 2024, 1:38pm UTC](https://discuss.bluerobotics.com/t/can-i-use-cerulean-rov-locator-for-auto-mode/18348/3 "2024-10-24T13:38:24Z")
This [thread](https://discuss.bluerobotics.com/t/view-lat-long-coordinates-cerulean-mark-ii-osd/17273) may be helpful! ---
**Author:** ![K-mura](https://avatars.discourse-cdn.com/v4/letter/k/839c29/32.png) [@K-mura](https://discuss.bluerobotics.com/u/K-mura)\ **Post date:** [October 25, 2024, 1:39am UTC](https://discuss.bluerobotics.com/t/can-i-use-cerulean-rov-locator-for-auto-mode/18348/4 "2024-10-25T01:39:44Z")
@tony-white Thank you very much. I am a beginner and it helped me a lot. Let me ask a few more questions. I understand how to use the ROV locator with the cellular tracker. I would like to eventually do these without a tether. Is there any way to use the ROV locator with Blue OS alone, Or do I need to write an original python script to route the ROVlocator information to the Blue OS NMEA injector? Any advice would be appreciated. ---
**Author:** ![tony-white](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/tony-white/32/18385_2.png) [@tony-white](https://discuss.bluerobotics.com/u/tony-white)\ **Post date:** [October 25, 2024, 1:02pm UTC](https://discuss.bluerobotics.com/t/can-i-use-cerulean-rov-locator-for-auto-mode/18348/5 "2024-10-25T13:02:31Z")
Hi @K-mura - While the topside ROVL receiver will be able to locate the ROVL transmitter on your vehicle, without a tether to send this position information via the vehicle won’t know where it is located! An acoustic or optical modem could conceivably be used to send this information? The ROVL transmitter _could_ be mounted on the surface, with the receiver on the vehicle as mentioned in the [documentation](https://docs.ceruleansonar.com/c/rov-locator/rovl-mounting-and-wiring/rov-deepside-mounting), however this is not the typical arrangement - I’d recommend contacting Cerulean for assistance with this approach if you require it.