# Waterlinked GPS with A1 locator shows abrupt readings **URL:** \ **Category:** Sonar and Acoustics\ **Tags:** water-linked, positioning, underwater-gps\ **Created:** [November 2, 2020, 12:17pm UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496 "2020-11-02T12:17:53Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![zeshankhan43210](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zeshankhan43210](https://discuss.bluerobotics.com/u/zeshankhan43210)\ **Post date:** [November 2, 2020, 12:17pm UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/1 "2020-11-02T12:17:53Z")
I interfaced waterlinked GPS with BlueROV with latest version of companion computer 0.22 and 2.5.1 version of GPS installed. The GUI page and QGround Control Panel both shows abrupt motion of the ROV even the ROV and master electronics enclosure is at stationary position. Attached is the snap for better understanding. ![IMG20201008142533](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/a/a465c0de976594910ffeab6531e6b760ed2336c9.jpeg) ---
**Author:** ![Boko](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/boko/32/7241_2.png) [@Boko](https://discuss.bluerobotics.com/u/Boko)\ **Post date:** [November 2, 2020, 4:45pm UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/2 "2020-11-02T16:45:42Z")
Hi! How does your diagnostic page in WL UI look like? Specially the diagram of receiver levels Also, does the depth on the WL UI in your screen above show the correct depth if you scroll down? ---
**Author:** ![zeshankhan43210](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zeshankhan43210](https://discuss.bluerobotics.com/u/zeshankhan43210)\ **Post date:** [November 2, 2020, 5:06pm UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/3 "2020-11-02T17:06:02Z")
Hi Bo, Thanks for your response. The diagnostic page shows waveform signals from 4 receivers. When I put my ROV having locator near to any one receiver its waveform shows some peak. The level are sometimes high and sometimes low on Y-axis. Regarding depth, previously I have a error of depth but after restarting the online page of waterlinked on companion software it is removed now. How can I check the depth reading? ---
**Author:** ![Boko](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/boko/32/7241_2.png) [@Boko](https://discuss.bluerobotics.com/u/Boko)\ **Post date:** [November 2, 2020, 8:44pm UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/4 "2020-11-02T20:44:05Z")
Hi! Depth reading you can see on the page in your first post on this forumcase. Lower left corner, see WL supportpage: [https://waterlinked.github.io/docs/underwater-gps/gui/position/](https://waterlinked.github.io/docs/underwater-gps/gui/position/) There are also example how receiver signals should look like: [https://waterlinked.github.io/docs/underwater-gps/gui/diagnostic/](https://waterlinked.github.io/docs/underwater-gps/gui/diagnostic/) Bo ---
**Author:** ![zeshankhan43210](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zeshankhan43210](https://discuss.bluerobotics.com/u/zeshankhan43210)\ **Post date:** [November 10, 2020, 7:42am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/5 "2020-11-10T07:42:47Z")
Hi Bo! I check the depth and it looks good and accordingly with the BlueROV but the GPS location on the GUI remain stationary and rotating at a fixed position. ---
**Author:** ![Boko](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/boko/32/7241_2.png) [@Boko](https://discuss.bluerobotics.com/u/Boko)\ **Post date:** [November 10, 2020, 10:04am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/6 "2020-11-10T10:04:28Z")
Post your diagnostic picture: [https://waterlinked.github.io/docs/underwater-gps/gui/diagnostic/](https://waterlinked.github.io/docs/underwater-gps/gui/diagnostic/) ---
**Author:** ![zeshankhan43210](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zeshankhan43210](https://discuss.bluerobotics.com/u/zeshankhan43210)\ **Post date:** [November 10, 2020, 11:08am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/7 "2020-11-10T11:08:20Z")
The diagnostic page shows noise signals from all receivers and when I put locator near to any receiver it shows peaks from that receiver and no response from other receivers. I will share the picture by tomorrow. ---
**Author:** ![zeshankhan43210](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zeshankhan43210](https://discuss.bluerobotics.com/u/zeshankhan43210)\ **Post date:** [November 12, 2020, 11:38am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/8 "2020-11-12T11:38:37Z")
Dear Bo, Please find the pictures of the diagnostic page attached below. When the locator is in contact with any receiver there is no peak but when it is close to any receiver it shows abrupt peaks from respective receiver. ![IMG20201112144517](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/2/296f18997d05da22f0290a3f079e1b9116545c57.jpeg) ![IMG20201112144507](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/0/0ef86faea2aa0ffe5d533cad09b71712f9aa7afb.jpeg) ![IMG20201112143430](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/c/c75968fb719c5fd8eb586aded5d3cc2919c7ace5.jpeg) ![IMG20201112143412](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/2/22a8d754d659b01311c4449e43a797ab8e641331.jpeg) ---
**Author:** ![Boko](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/boko/32/7241_2.png) [@Boko](https://discuss.bluerobotics.com/u/Boko)\ **Post date:** [November 12, 2020, 2:30pm UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/9 "2020-11-12T14:30:58Z")
Hi! As you said there is at best signal from one receviever at a time. Some resons: -Are really all receivers and transmitter in water (Sorry for stupid question) -Check error page in WL user UI (Button in top of page) -Correct choice of transmitter type in WL user UI -If using transmitter U1 or S1, do it have GPS satelite connection (green LED on transponder) -Something wrong with connection from transmitter to WL electronics -Faulty transponder In you dont find solution, it seems to me problem within Waterlinked system. Try support from Waterlinked forum: [https://waterlinked.com/forums/forum/underwater-gps/](https://waterlinked.com/forums/forum/underwater-gps/) Or create a support ticket at: [https://waterlinked.com/create-ticket/](https://waterlinked.com/create-ticket/) ---
**Author:** ![zeshankhan43210](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zeshankhan43210](https://discuss.bluerobotics.com/u/zeshankhan43210)\ **Post date:** [November 19, 2020, 9:55am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/10 "2020-11-19T09:55:37Z")
Dear Bo, I am not using the FXTI board offered by BlueROV as my ROV was ordered before BlueROV offered it with the ROV instead I directly connect the wires as shown in the BlueROV integration page. Does it effects the result. If yes how can I use the waterlinked GPS without FXTI board. ---
**Author:** ![Boko](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/boko/32/7241_2.png) [@Boko](https://discuss.bluerobotics.com/u/Boko)\ **Post date:** [November 19, 2020, 11:05am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/11 "2020-11-19T11:05:15Z")
Hi! As long as the ROV/Companion, the Topside computer and the Waterlinked system is on the same network and talking to each other, the way of network do not matter. Since you can reach the waterlinked UI from topside, and the depth in UI is correct, then all three systems must work correctly already. ---
**Author:** ![zeshankhan43210](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zeshankhan43210](https://discuss.bluerobotics.com/u/zeshankhan43210)\ **Post date:** [November 20, 2020, 8:15am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/12 "2020-11-20T08:15:34Z")
Hi Bo, The locator wires are directly connected to the one pair of tether which moves through 300m tether and then ends up in the Electronics board without any in between booster signal conditioner or Fathom. My question is that can it takes the data for such a long distance without any signal conditioning. ---
**Author:** ![Boko](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/boko/32/7241_2.png) [@Boko](https://discuss.bluerobotics.com/u/Boko)\ **Post date:** [November 20, 2020, 9:03am UTC](https://discuss.bluerobotics.com/t/waterlinked-gps-with-a1-locator-shows-abrupt-readings/8496/13 "2020-11-20T09:03:24Z")
Hi! One of my systems run exact like that without problems. BR tether 300 meter, Waterlinked A1 transponder. Works with both Waterlinked Gen1 and Gen2. And i am sending 240V AC in the same cable… Still you could have connection problem. If you have tether connector, you can try making a short “pool cable” just to test.