1) Ship type 
The capital ships of a navy are its most important warships; they generally possess the heaviest firepower and armor and are traditionally much larger than other naval vessels. A capital ship is generally a leading or a primary ship in a naval fleet. William S. Lind, in the book `America Can Win` (p. 90), defines a capital ship. He states that 
[n] - a warship of the first rank in size and armament
noun a warship of the first rank in size and armament