List of unnamed D'Vahl-type patrol ships.
Earth fleet []

Patrol ship among the group
This patrol ship was among the group of ships that welcome Enterprise NX-01 home after the Xindi incident in 2154. (ENT: "Storm Front, Part II")
Shuttlepod interceptors []

Engaging an Earth shuttlepod.
Two patrol ships engaged a shuttlepod launched from Enterprise, as it attempted an unauthorized landing on Vulcan in 2154. (ENT: "Awakening")
Battle of Andoria []

The Vulcan fleet
Several patrol ships were part of the fleet ordered by Administrator V'Las to attack Andoria in 2154. Four D'kyr-type combat cruisers and several Vahklas-type cruisers were also part of this fleet. (ENT: "Kir'Shara")