Fabulous quote from the Black Swan document by the way.
“Survivability. With resilience stemming from numbers, and the intent to keep the host platform outside the tactical weapon envelope of potential adversaries, cost has been reduced through adopting commercial standards where possible. If the risk to the platform from enemy action is low, then adopting commercial International Maritime Organisation conventions on subdivision and damage stability is a feasible option. ‘For a combatant, adopting The International Convention for the Safety of Life at Sea19 to define the safety limit would not be appropriate, unless the military value of the asset is equitable with the value and availability of a merchant ship’.20 This fits well with a philosophy of survivability through platform numbers.
The future adoption of this reduced standard permits a one-compartment damage standard, with a reduction of watertight bulkheads from around 8 to 4. This generates a significant cost saving, both in terms of hull structure and system complexity. It also reduces the amount of armour required. With the crew concentrated in the superstructure and hull under the bridge, this area can be economically armoured against small arms fire. The only other allowance for armour in the design is for protection to magazines. The relaxation of shock and other military standard requirements for machinery and other equipment will also have a significant effect on the cost of the platform. This philosophy sees a shift in emphasis from ship, to crew survivability.”
Translation "if hit, it is hoped that the flooding will put the fire out.."