Modern destroyers need room for powerful radars and their computers. A rough allocation gives about 30 percent of ship space to engines and power supply, 30 percent to computers and sensors, and 30 percent to weapons. The remaining tenth accommodates the crew. Helicopters and hangars count as weapons because they form part of the ship's deployable fighting systems. These are illustrative estimates, not precise layouts for every warship. Heavy sensor installations such as SPY-6 add to the size demands.
Notable Point · 31:44-32:39
Why modern destroyers need room for computers and power
A rough space-allocation sketch shows how sensors, computing and power demands contribute to warship size.