This piece was inspired in part by a story, Raising the Dead, about an attempted body recovery from the bottom of one of the world's deepest freshwater dive sites. Cave diving rescue attempts often end as body recoveries. In this case, the recovery attempt ended tragically as well. The story scared the heck out of me. I don't think I can imagine a more frightening rescue scenario.
I almost used this illustration for a coworkers baby shower instead, as the Noah's Ark story is a tale of rescue.