Union built
NNSBDD builds good carriers. These issues are caused from a GREEN mandate added to the problems the commanders stated. Back in the 1980's the ships commode discharge system on carriers was changed over to a system called CHT if I remember right. This was navy wide I think. The discharge unlike previous ships does not go directly out a discharge port. To unstop commodes before then it was fairly easy. You hooked a fire hose to the discharge of the commodes and use fire main pressure to unclog the line.