[Kirkwood]

You can see an iceberg flip over here.

https://www.youtube.com/watch?v=Sh271FAVZ0o

[FredZarguna]

I think it's pretty clear in that picture that the iceberg flips no more than about 60-70^°. I don't mean to suggest [and didn't mean to suggest in the original post] that an iceberg can't flip 180^°. It can actually flip more than 180^° if it has enough angular momentum when it turns. But it will equilibrate into a position where most of the 'berg is once again under water when it finally settles. The "once bottom" of the berg does not flip out of the water. Just whatever facet is necessary to restore the equilibrium of buoyant force and torque. The article is just incorrect.