What was Noah's first recorded action after leaving the biblical Ark?
Answer
He built an altar
Noah's first recorded action after leaving the biblical Ark was building an altar.
Genesis 8:20 says that Noah built an altar to the Lord after leaving the ark and offered burnt offerings from the clean animals and clean birds. This is the first altar specifically attributed to Noah in the narrative.
The account then describes God's covenant with Noah and the rainbow sign. The sequence places worship immediately after survival and before the story turns to the future relationship between God, humanity, and the living world.
Noah later plants a vineyard in Genesis 9:20, so the vineyard is not his first recorded action after disembarking. That later episode leads to the story of Noah becoming drunk and the actions of his sons. The altar and the vineyard belong to separate moments in the post-Flood narrative.