He was trying it. Now. However, Will did have to admit it was a cleaver idea. He was going to have to remember it. Though, you would need a strong partner to keep the boat down. With the current and the boat itself, it was very difficult as it was to keep it down. Boats were meant to float. Holding it under water as well as trying to keep yourself below wasn't as easy as everyone made it out to be.

Nodding, he took a deep breath and let go as well. Having grown up on an island surrounded by water, he was an excellent swimmer. He didn't even get disoriented as he swam back toward the surface, breathing out slightly, the air bubbles going up ahead of him. Breaking the surface beside the boat, he inhaled and looked for Vivienne. The men on the boat above had spotted them and were shouting out orders. A rope came down. Catching it, Will gave it to Vivienne. Let her go first. Not only was it the polite thing to do but no doubt if he went up first, there would be a slight awkwardness until Vivienne came up and explained he was with her. 

Brushing the wet hair out of his eyes, he followed up after her. His eyes took in her bare legs before he glanced away. He steeled himself and climbed up on deck.