There is an armor belt beneath the wood deck. Though I doubt burning missile propellant spread all over your decks is going to be helped by a wood deck. Here is a pic of an ordinary subsonic Tomahawk attacking an F4 Phantom through several feet of hardened reinforced concrete using a penetrating warhead. The antiship missiles we are discussing here move at roughly 3-4x the speed of the Tomahawk and have more mass, though only the SS-N-19 and SAWHORSE have bigger warheads. It is also worth pointing out that most warheads are described as "semi-armor piercing". In sinkexs there have been cases of missiles passing clean through the target ship without detonating which naturally does less damage to the ship. Most modern anti-ship missiles want a certain amount of penetration; but not over-penetration (sound familiar?). However, you can increase the penetration by changing the warhead - this concept is used to turn missiles like the Harpoon into hard target attack missiles like the SLAM. Let's say Rich's estimation of the BBs missile-soaking ability is correct and it absorbs a tremendous number of missiles designed to penetrate ordinary unarmored modern warships (though many of the missiles were developed with the express purpose of attacking U.S. carrier groups and penetrating deeply enough into a carrier to at least mission kill it). Let's also assume that our ASW reigns supreme and no sub can close with a BB, even though diesel-electric subs generally dominate littoral waters. Now the invulnerability of our $1.5 billion BB carrying 1,100 sailors rests on the ability of our enemies to come up with a more successful armor piercing warhead that can be mounted on an existing anti-ship missile. Considering the ability of the TOW II to penetrate modern complex armor (with the entire missile weighing 48lbs.), what do you think our enemies might be able to come up with given a 705lb-1,653lb payload JUST for the warhead?