Early torpedo-boat destroyers displaced only a few hundred tons, so a fixed historical tonnage limit would be a poor guide to modern classification. Warships have grown as their expected tasks and equipment have expanded. A rough allocation gives about a third of internal volume to personnel and supplies, a quarter to a third to power systems, and another quarter to computers and sensors, with weapons occupying the remainder. These proportions illustrate the explanation without specifying a particular class.
Notable Point · 1:52:55-1:54:09
Why displacement alone cannot define a destroyer
The growth from small torpedo-boat destroyers to large modern warships reflects the space demanded by crews, machinery, sensors, and weapons.