Fenix5 Pool Swim Intervals

You can do it but you need to setup a workout on Garmin connect for that.

Create a new workout, set the interval distance and stroke (or leave any stroke so the watch will detect what you are doing). Add as many intervals as you want. Make sure there is no rest or lap button press set between the sets so it will automatically go to the next set, or set a small rest time.

Upload the workout to your watch and have a nice swim!

Alternatively I think you should be able to see your data for each 25m on the Garmin connect website (wether you use a workout or not)

Hope this helps!

When you turn at the end of the pool you have to start the next lap with some force to get the watch to "see" the lap. AFAIK the watch uses the accelerometer to detect the beginning of the New lap. 

Regards, 

Thank you for the suggestion.  I will try it, but it seems like more trouble than should be necessary.  I have been unable to find the 25 meter breakdown on the website but will take another look.

Yes, I've experienced that but was holding back my problems in that regard in order to reduce the complexity of my post.  My swim reports show a total distance that is "mostly" accurate.  I do get "false turns" (and thus extra distance) recorded, but the error is usually in the direction of too many lengths rather than too few.  The device detects that I'm turning (sometimes even when I don't) it's just not breaking the calculated distance down into the reporting intervals that I would like.

Here's a gif showing you how to check your lengths on connect (on the web not on mobile):

g.recordit.co/ZkjN3OxyrH.gif

if you miss a length you can also correct your FIT file on this website www.swimmingwatchtools.com