Catechism of the Catholic Church §1221 — excerpt
But above all, the crossing of the Red Sea, literally the liberation of Israel from the slavery of Egypt, announces the liberation wrought by Baptism:
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: Roman Missal, Easter Vigil 42: Blessing of Water: "Abrahae filios per mare Rubrum sicco vestigio transire fecisti, ut plebs, a Pharaonis servitute liberata, populum baptizatorum praefiguraret."