OK, I feel I must point out something rather important here:
Spanish Armada: 1588.
Battle of Trafalgar: 1805.
The Armada was beaten by a combination of Francis Drake and (in the main) a big storm. Two hundred years later, the larger French fleet was taken apart by Nelson, using new tactics that the French couldn't deal with. Rather than fighting a traditional "line" battle, where the two fleets sail in a line past each other and fire broadsides, he split his fleet into two columns, which then sailed through the French line. This meant the French couldn't get clean broadsides off, while the RN could fire right down the decks of the French ships as they "crossed the T", as ngtm1r said.
As for the original topic - congrats to Corhellion for getting published, though I too don't really like the designs of the ships.