The Vivoactive 3 and Forerunner 645, in particular, do NOT support ‘Open Water Swim’ though they do support ‘Pool Swim’.
This distinction and restriction drives folks nuts, so, I decided to get to the bottom of it.
It has all to do with GPS/Glonass support — or lack thereof IN WATER.
GPS does not work very well when the sensor is submerged in water. THAT IS THE CRUX OF THE ISSUE.
If you just want a GPS distance and track while you swim in open water you could try putting your watch into running mode and having it attached to a swim cap. That is supposed to work.
‘Pool Swim’, by definition, means that GPS is DISABLED. Pool swim data is measured using the ACCELEROMETER. Got that? No GPS … just accelerometer.
So, how do the more expensive watches like the Garmin Forerunner 935 and Fenix 5 support open water swimming? They use the GYROSCOPE.
With the gyroscope you only need occasional GPS fixes. The gyroscopes fills in the gaps between the GPS readings. The Vivoactive 3 does NOT have a gyroscope. Hence why open water swim is not available.
But, alas, a gyroscope alone is also NOT enough. For open water swim you ALSO need a powerful enough CPU to continually calculate the data. Got that?
Hence why open water swim is not supported on the Forerunner 645 though it has a gyroscope. The CPU in it is not as powerful as that in a FR935. Got that.
So, that is the deal.
To get open water swim support you need a gyroscope and a big enough CPU. Without that you only get pool swim which only uses the accelerometer.
You can TRY and use running or pool swim in open water — though the results will be mixed and most likely inaccurate.
So, that is the story. Now you know.
Click pictures to ENLARGE.
It was somebody’s birthday yesterday, March 22nd, and we ended up going to Steeplegate Mall, Concord twice in the day. Once in the morning to get her ears pierced and then a few hours later so that she and two of her friends could gallivant before dinner at Friendly’s.
No, I did not buy those shades, BUT maybe I should go and get them. They are very me.
Well, guess whose birthday it was yesterday. She turned 12. She has established that going to “Friendly’s” is THE ritual for her birthday. So, that is what we did — this being the one in Concord (N.H.) on Loudon Road. We go to both in Concord, more or less in equal measures depending one where we are in Concord. It is always a good experience. They have got the formula nailed — though, surprisingly, they do NOT carry birthday candles (and unlike last year we forgot to take some).
Click pictures to ENLARGE.
Attribution WILL be enforced.
This “Concord School District — Youth Art Month” exhibition at the Steeplegate Mall seems to be, of late, an annual event — in March.
We were at the Mall, on March 22nd too as it happened, last year and I was impressed with what I saw as attested to by this post. [March 22 is Teischan’s birthday, and last year and this year she wanted to take her friends to the Mall prior to going to dinner at Friendly’s. Hence, being at the Mall, two years running on March 22.]
Incredible work. What amazing talent. I was so impressed and so pleased. I wish I could have stayed longer and taken more — and better — snaps. But, the kids were hungry. So, I had to dash off a few quick pictures. I have NOT done this exhibition adequate justice. SORRY.
I tip my hat to the kids, the teachers and all that rallied around to make this exhibition a reality and a SUCCESS. The one BRIGHT SPOT is an increasingly forlorn and empty mall.