We have the Sacraments.
Yes, one of which is Baptism.
From: http://www.catholic.sk/main.php?page=183-en-Rite_of_Baptism
Celebrant: Father, you give us grace through sacramental signs, which tells us the wonders of your unseen power.
In Baptism we use your gift of water, which you have made a rich symbol of the grace you give us in this sacrament. At the very dawn of creation your Spirit breathed on the waters, making them the wellspring of all holiness. The waters of the great flood you made a sign of the waters of Baptism, that make an end of sin and a new beginning of goodness.
Through the waters of the Red Sea you led Israel out of slavery, to be an image of God's holy people, set free from sin by Baptism. In the waters of the Jordan your Son was baptized by John and anointed with the Spirit. Your Son willed that water and blood should flow from his side as he hung upon the cross. After his resurrection he told his disciples: “Go out and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit.” Father, look now with love upon your Church, and unseal for her the fountain of Baptism. By the power of the Spirit give to the water of this font the grace of your Son. You created man in your own likeness: cleanse him from sin in a new birth to innocence by water and the Spirit.
The Catholic Church references the Flood (rightly) in the Baptismal sacrament rite. If you don't hold to the flood as a historical event are you not disagreeing with the Catholic Catechism and should not participate in the Eucharist until you go to confession and return to obedience to the Catholic church?
I know a flood happened. I even mentioned it on the thread somewhere. Cave drawings also show an ENORMOUS flood. I was questioning the Ark's ability to hold pairs of EVERY living creature.
The Church does NOT mandate belief in that Ark. It's not in any catechism. There ARE mandates of belief: Mary's immaculate conception of God's Son, Jesus, by the Holy Spirit, for one.
The Church is more interested in our behavior according to God's plan...not whether Noah could fit the elephants into the Ark or not. We are to love God and love each other. It's a SIMPLE plan God has for us....not always an EASY one to follow, but a simple one.