This picture was taken on the Sea of Tiberias from the boat that Peter and the other disciples were in when they were fishing, after the Resurrection (John 21:1-14.) If you look closely you can see Jesus on the shore gathering wood to build a fire to cook fish for breakfast! (Clicking on the picture enlarges it.)
I did take this picture from a boat that was modeled after the kind that Peter would have used for his fishing business. I swam in the Sea two mornings. From the shore the water gets deep quickly so St. Peter would have had to swim the hundred yards to shore (the length of a football field.) It does seem counterintuitive for him to put something on to jump into the water.
Just taking this story at surface value, it has always seemed to me to express such a warm, intimate human relationship between Jesus and his disciples.