Вот что ответила поддержка на мой вопрос о том, что не фиксируются рекорды по плаванию.
I apologise for the delay.
Personal Records for Pool Swimming Activities
Garmin Connect has the ability to display Personal Records (PRs) for swimming from devices that support Swim PRs1. These PRs will display for the fastest time over certain distances while pool swimming. Garmin Connect can display swimming PRs for the following distances:
- 100 meters
- 100 yards
- 400 meters
- 500 yards
- 750 meters
- 1000 meters
- 1000 yards
- 1500 meters
- 1650 yards
- Longest Distance
The following information explains how swimming PRs are designed to work:
- Swimming PRs are automatically detected on certain Garmin devices1. These devices send the PRs information to Garmin Connect for display. Garmin Connect will not automatically detect PRs in swimming activities from other devices, for example the Forerunner 920XT. For users of Garmin devices that support pool swimming but not personal records for swimming, it is possible to manually assign PRs within Garmin Connect. For more information on manually assigning a PR in Garmin Connect see the Related Content.
- Swimming PRs must be set in a single interval without rests. For example, a 400 meter will be set by swimming 400 meters continuously, or by swimming 500 meters where the 400 meter portion is a PR. The 400 meter PR cannot be set by doing 4 X 100 meter intervals with rest intervals in between.
- The Longest Distance PR is an exception in that this PR is for the entire swim session. This means that there can be rest intervals during Longest Distance PR. However, if there are rest intervals, the time for this PR will include the rest time.
- Swimming PRs can be recorded in either yards or meters depending on the pool size for that activity. A single activity cannot count towards both a PR in yards and meters. There is only one Longest Distance PR, displayed in the units of the pool size for the overall longest swim.
- Pool swim PRs can only be set by swimming the exact PR distance thus requiring the activity to be completed in a pool that will allow for the exact PR distances. For example, a 100 meter PR cannot be set in a 17-meter pool because 100 is not a multiple of 17.
- Swimming PRs can only be done in the Pool Swim activity profile, and PRs will not display for Open Water Swims
1 Garmin fenix 5 series, Forerunner 735XT, Forerunner 935
Т.е. garmin fenix 3hr функцию автоматического определения рекорда на дистанции не выполняет.