I read that book, I think he said their sonar was ineffective above 12 knots. That was an issue for sure....
LOL, ya think?????
That is almost comical, but...a good thing, because as screwed up as their upper rank officers often were, their destroyer teams had a lot of skill and extreme aggressiveness and tenacity.
That limitation probably saved a good number of our men (though we probably didn’t know it at the time)