"At that time Jesus came from Nazareth in Galilee and was baptized by John in the Jordan. Just as Jesus was coming up out of the water, he saw heaven being torn open and the Spirit descending on him like a dove. And a voice came from heaven: “You are my Son, whom I love; with you I am well pleased.” "

http://www.biblestudytools.com/mark/passage/?q=mark+1:9-11

...and...

https://www.google.com/search?q=jesus+helping+peter&tbm=isch...

...so maybe just water / splash resistance, and not a dive watch / water proof.