<strong>GM Note:<br/><br/></strong>Viola, you take a deep breath and dive into the water.  You are in luck: the shipwreck has resulted in something resembling a dam, meaning that what would usually be described as rough water is relatively calm (DC 10).  You successfully dive, and manage to reach Yuki in the water below.<br/><br/>Yuki, your lungs are burning, and you are running the risk of drowning.  Please roll a Constitution check of DC 10.  For you, this would be a 1d20+3.