A:Answer YES. It is waterproof, not just water-resistant, so you can swim with. It even has a swim feature built in that tracks your strokes, . As with anything you use in saltwater, give it a good rinse when you're done for the day.
It has a water rating of 5 ATM (50 meters or about 165ft)
From Garmin:
Suitable:
•Splashes
•Rain or Snow
•Showering
•Swimming
•Diving into water
•Snorkeling
The other person is wrong.