By and Large
By and Large was probably chosen not because it rhymed with barge but more for the origin of the phrase, which is an old Royal Navy sailing term.
A vessel that could sail close to or "By" the wind, and that could also sail away from or "Large" to the wind, was a good all rounder. Referring to "By and Large" meant referring to most circumstances.
If they're putting sails on the barges, that would be my bet as to why it was chosen!