I was looking through some old maps published in Hamburg in the 1790s and the label Atlantische Ocean stuck out to me.
I would expect it to show Atlantischer Ozean (and looking at modern maps seems to confirm this), because der Ozean is a masculine noun. I know that German spelling has changed over time, but has the gender of this word also changed? Or is there a reason why one might use Atlantische Ozean without a preceding der?