@Soretna , the Rig Veda has several intriguing references to the "aerial waters" , or the "celestial waters"...my hunch is all such references are actually correlating with the massive rivers of Hollow Earth which carry enormous quantities of fresh water "outside" into the Arctic Ocean , via the Abyss (North Polar opening) . Also , the final descent (rather ascent from outer surface of Earth point of view) of these Hollow Earth rivers occurs through some sort of spiralling motion (whirlpool effect !)...
Therefore , those ancient images from Buddhist texts , depicting a strange ICE-FREE whirlpool at the North Pole are REAL (!!) , just that those cannot be seen in the Arctic Ocean on the surface , as this phenomenon occurs on the other side of the Polar Opening (inside Hollow Earth)...I am getting goose bumps with this sudden realisation - it hit me like a ton of bricks !
I now suspect that navigating a ship or small vessel from the Arctic Ocean , into Hollow Earth is especially challenging due the swirling waters of the whirlpool , on the other side (inside Hollow Earth) ! It might indeed be acting like a natural barrier , preventing vessels from outer surface of the Earth from reaching inside Hollow Earth . This may well be one of the reasons , why any sailors that did drift across did not survive to tell the tale - it could also explain why so many mammoths , still living inside the Hollow Earth , get trapped in that whirlpool and then freeze to death , as soon as they are "ejected" out into the Arctic Ocean on the surface...
Olaf Jansen and his father might just have gotten lucky to have achieved a safe passage through the North Polar opening :))
***I firmly believe all Hollow Earth researchers should thoroughly read up this chapter from "Arctic home of the Vedas" - it contains very deep insights about the whole Earth water cycle , something that cannot be found in any other text - ancient or modern .
Regards