Quote Originally Posted by OakLeaf View Post
https://forums.garmin.com/showthread.php?t=8629

ANT+ wireless connections have a range of only 5 cm underwater. So if you put your ANT+ watch in your bra it should work , otherwise not.
That sounds... uncomfortable?

Mine definitely didn't work underwater. As soon as I got in the pool the HRM went beep beep, can't find you. I admit I didn't think to try them 5cm apart