# Not getting Doppler Velocity in DVL values

**URL:** <https://discuss.bluerobotics.com/t/not-getting-doppler-velocity-in-dvl-values/14114>\
**Category:** Third Party Products\
**Tags:** water-linked, dvl, blueos\
**Created:** [April 13, 2023, 7:50pm UTC](https://discuss.bluerobotics.com/t/not-getting-doppler-velocity-in-dvl-values/14114 "2023-04-13T19:50:24Z")\
**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:** [April 14, 2023, 2:10am UTC](https://discuss.bluerobotics.com/t/not-getting-doppler-velocity-in-dvl-values/14114/2 "2023-04-14T02:10:06Z")

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Hi @kjoshi,

Given the DVL is reporting that its velocity estimates aren’t valid, the extension will be ignoring those estimates instead of passing them on to ArduSub (because otherwise it’s feeding effectively random numbers into the state estimator).

There’s some reasonably in depth discussion of getting valid velocity readings in [this comment](https://discuss.bluerobotics.com/t/water-linked-dvl-a50-support/9123/52), which will hopefully help 🙂

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