In a word doesn't this show why we have have a problem with the EA? Congratulations for at long last doing some dredging, but "far more environmentally friendly than traditional methods.". The problem with the EA is they have lots of responsibilities, and navigation is a pretty minor part, the envirinmental concerns far outweighing navigation. BW only have navigation to concern themselves with.
Still can't understand "and with no waste to dispose of", surely that's the whole point!