Yeah, but in the satellite age, where we can map every square centimeter of the ocean floor from a hundred miles up, it seems like missing a mountain when constructing the navigation charts is quite a bit bigger pile of "stuff" than usual.
It makes you wonder, how many other enormous mountains are not shown on Navy navigation charts?
Not so.
I don't think we can map the ocean floor to anywhere near the resolution needed for navigation charts.
I think there are dozens, if not hundreds of undersea "features" that have yet found.
It makes me smile to think of the outrage expressed at missing data in navigation charts, when cartographers can't even get street maps right.