The water on which the Ark floated is a type of the baptism which saves you now
Christ himself, innocent though he was, died once for sins, died for the guilty, to lead us to God. In the body he was put to death, in the spirit he was raised to life, and, in the spirit, he went to preach to the spirits in prison. Now it was long ago, when Noah was still building that ark which saved only a small group of eight people ‘by water’, and when God was still waiting patiently, that these spirits refused to believe. That water is a type of the baptism which saves you now, and which is not the washing off of physical dirt but a pledge made to God from a good conscience, through the resurrection of Jesus Christ, who has entered heaven and is at God’s right hand, now that he has made the angels and Dominations and Powers his subjects.