What is the name of the ship that had two covered gun decks?
The First Anglo-Dutch War (1652–54) saw the development of the line of battle, a tactic where ships formed a continuous line to fire broadsides at an enemy. Previously, naval tactics had favored short-range firepower and boarding with intent to take prizes. After the mid-17th century, tactics shifted from close-quarter fighting to disabling or sinking opponents through superior, long-distance firepower. This entailed major changes in doctrine, shipbuilding, and professionalism in European navies from the 1650s onwards. The line of battle favored large ships that were heavily armed and robust enough to hold the line in the face of enemy fire. The increased centralization and concentration of power in the emerging nation-states during the late 17th century allowed for a great expansion of armies and navies, and new government shipyards began building much much larger ships. Sweden embarked on an expansive shipbuilding program in the late 1660s.Kronan was one of the most heavily armed warships in the world in 1672 when she was launched, a three-decker with 110 guns. The ship had three full gundecks with guns from bow to stern. Altogether there were seven separate levels, divided by six decks. Furthest down in the ship, above the keel, was the hold, and immediately above it, but still below the waterline, lay the orlop; both were used primarily for storage. Above the orlop were the three gundecks, two of them covered, while about half of the topmost gundeck was open to the elements in the ship's middle, or waist. The bow had one deck, making up the forecastle, and the stern had two decks, including a poop deck.
Kronan