You're reading things into the sentence that don't exist.

I understand the PT not because I can understand the language but because I can model the grammar (science) in my mind. I know what the words mean because I solved them in context. So when Egyptologists insert later meanings that are different it is quite apparent. The "henu boat" was a sort of float in some sort of parade in later times (and still), but in the PT it was the counterweight they filled with water. Mercer called it "3nw-boat" and others call it "henu boat".

The reality is "henu boat" is a confusion of the earlier term.