A heavy destroyers is a type of destroyer that is more heavily armed and armored than a standard destroyer.
The Romulan heavy gunship classification was equivalent to a heavy destroyer. (Ship Recognition Manual, Volume 5: Starships of the Romulan Star Empire)
Heavy destroyers by race[]
- Cardassian heavy destroyers
- Hydran heavy destroyers
- Klingon heavy destroyers
- Lyran heavy destroyers