ORIGINAL: Dan S
The forerunner and Foretrex series are all compliant to IPX7 which is 1 meter underwater for 30 minutes.
Dan.
Geko and Etrex are also IPX7 standard but they are not waterproof. Just a warning to other users. Hitting the water at 50 mph is not the same as sitting in 1 metre of water. [8D]