[WildTurkey]

It was his resposibility to communicate to his superiors the fact that the area in which he was operating was uncharted, and therefore dangerous to move at flank speed in.

You have his charts which list that area as UNCHARTED?

[Long Cut]

No, but I do have only the published reports to go on. They all say that the mountain was uncharted, in an area where the charting of the undersea floor was likewise incomplete.

It WAS known that there were numerous pinnacles and undersea mountains in the area. Given this, going at flank speed (and therefore being nearly blind ahead) does not seem "prudent". The review will doubtless bring this up.