“Knowledge of what? Again, the subsection is clear. It says unseaworthiness, not facts which in the upshot prove to amount to unseaworthiness. Accordingly, it seems clear to me that if this matter were res integra, the section would mean that the assured only loses his cover if he has consented to or concurred in the ship going to sea when he knew or believed that it was in an unseaworthy condition. I add the word “believed’ to cover the man who deliberately turns a blind eye to what he believes to be true in order to avoid obtaining certain knowledge of the truth”