God was there, so trust the the Holy Spirt knows what He was telling moses!why can't we simply accept what the Bible says, without trying to second-gess the Lord? There is ZERO evidence in the Bible that even hints at a "local" flood. The Author as you put it, is Moses, and he wrote what God the Holy Spirit told him to, so we can fully Trust it
				
 You see 'Calvinism boogeymen' everywhere, don't you?