Have seen 'Waterspeed' listed as the gos device on some recent KA72 files of wingers lately and wondered about the accuracy of the gps unit which seem to be recording big speeds in OZ lately.
First pic is from KA72 file showing gps as 'Waterspeed', (which I thought was just an app.)and records gpx files.
Other question is the accuracy of a 'Vakaros' gps unit which is used by some wingers.
Am interested if these are accurate devices or not really delivering reliable data.
Thanks. 
There is a lot of discussion on this forum about gps devices and their various accuracies, etc. Keep reading. You will find a lot of info here.
I never post speeds to records, but I use a Garmin 255 watch for general windfoiling. It, and its followers, is one of the recommended devices.
Waterspeed is an app Mikey, not a gps, can run it on apple and Garmin watches, have a look at another thread about it a few lines done on this page
I use Waterspeed on my Apple Ultra watch, which I find gives pretty good results (compared to my Mini Motion). Before the Ultra I had an Apple v6 and the results from that were unreliable. I only post results to GPSTC using my Mini Motion, but for winging i only post to KA72, so I use Waterspeed and my Ultra for that (simpler). Sadly no big Waterspeed winging speeds from me though :(
I have seen the occasional spike, which usually relates to a crash and the watch being underwater. A spike is pretty obvious when you look at your track and that section can easily be trimmed out with Waterspeed, however sometimes they don't appear until you upload the gpx to KA72. If this happens, I'll remove the post from KA72, fix the track, then repost. If people just post their results blindly without checking - in KA72 - that their numbers are reasonable and their track looks right, then I can see how problems could arise. To be fair, you should check that your results are valid no matter what gps and app you use.
Select to expand quotemikey100 said..
Have seen 'Waterspeed' listed as the gos device on some recent KA72 files of wingers lately and wondered about the accuracy of the gps unit which seem to be recording big speeds in OZ lately.
All depends on the watch, some are horrible, some are great.
Good ones within 0.5kts.
Bad ones +/- almost 2.0 kts.
And anything inbetween.
Select to expand quoteDezza said..
Waterspeed is an app Mikey, not a gps, can run it on apple and Garmin watches, have a look at another thread about it a few lines done on this page
Yea, I have the Waterspeed app on my Garmin 255, and it shows up as Garmin 255 when I post using KA72, but the screenshot above from KA72 shows the gps as 'Waterspeed', so I was confused as to what the gps unit actually was.
Am guessing it may be in fact an Apple Watch.
Its sunny tomorrow. Windsurfing in winter is not my thing. But I could go for a ride on the pushbike while wearing a Garmin 255, Motion and running Waterspeed on the Android phone, if thats a help.
It seems you can export any GPX file from waterspeed. I uploaded data from the coros watch to waterspeed then exported the GPX file. When loaded to KA72 then is shows as waterspeed. No need for bike rides 
I'll assume if the app is on your Garmin or Apple phone it registers the device, but if you do the direct export from waterspeed it registers as waterspeed.
I was talking about using the Waterspeed app on Android phone to record a session. It connects to Garmin but I don't know if it is pulling in sessions from the watch or sending them to the Garmin app. It's all a mystery to me!
Select to expand quoteremery said..
It's be interesting. sunny tomorrow. Windsurfing in winter is not my thing. But I could go for a ride on the pushbike while wearing a Garmin 255, Motion and running Waterspeed on the Android phone, if thats a help.
Would be interesting
Select to expand quoteAus501 Boz said..
It seems you can export any GPX file from waterspeed. I uploaded data from the coros watch to waterspeed then exported the GPX file. When loaded to KA72 then is shows as waterspeed. No need for bike rides I'll assume if the app is on your Garmin or Apple phone it registers the device, but if you do the direct export from waterspeed it registers as waterspeed.
Yep. I uploaded a Garmin file into Waterspeed and then put it through KA72 and it showed the gps device as 'Waterspeed'.
I imported a couple of FIT files into the Waterspeed app, it showed track, distance and heart rate but no speeds.
Vakaros $1200-1900. Pricey. Accurate to 2 cm but didn't read about speed or files. Not for me from the get go
Michael George has spent some considerable time compiling details of many current model GPS units. There is mention of the the apple watches and the waterspeed app.
logiqx.github.io/gps-details/
Select to expand quotetbwonder said..
Michael George has spent some considerable time compiling details of many current model GPS units. There is mention of the the apple watches and the waterspeed app.
logiqx.github.io/gps-details/
Since the initial Apple investigations, I've also spent some time looking at the Ultra 2 and Series 10, thanks to Flex2 collecting lots of data.
I still need to write up what I learnt about those watches, but I've been a bit too busy these past few months.
Select to expand quoteStretchy said.. If people just post their results blindly without checking - in KA72 - that their numbers are reasonable and their track looks right, then I can see how problems could arise. To be fair, you should check that your results are valid no matter what gps and app you use. that's been the issue since the start of KA72 
Ignorance was bliss ??
In the early days captains used to scrutinize tracks, at least in WA ??
Does anyone know anything about the GPS units in the lead pix? Apart from pricey price
