Germany's proposed F127 is treated as an air-defence specialist with additional land-attack and anti-ship weapons. Those extra capabilities do not change its main role in German doctrine. The Type 26 provides a parallel example: its British form centres on anti-submarine warfare, while other versions add capabilities with the intention of preserving that core mission. Destroyers are described as generally becoming more flexible and multipurpose. Type 45 is acknowledged as an exception with a specialist air-defence role, so the labels also depend on the navy and period involved.
Notable Point · 3:27:50-3:29:33
Why frigate and destroyer labels depend on the main mission
F127, Type 26, and Type 45 show how a navy's main operational requirement shapes ship classification even when the vessels carry several kinds of weapons.