Enolian patrol ship
Enolian patrol ships were heavily-armed starships utilized by the Enolian Guard for patrol duty during the mid-22nd century.

In 2152, a vessel of this class intercepted  as it was leaving orbit of Keto-Enol. The patrol ship discovered apparent contraband aboard the  and apprehended the pod's occupants, Jonathan Archer and . 

Later, after it was discovered that Archer and Tucker were taken captive accidentally, the Enolian official who assisted them in locating the Enolian transport they were on suggested using patrol ships to intercept the transport, as they were several hours closer to it than Enterprise was. 

Two of the patrol ships approached the transport, and nearly disabled it before they were lured in and disabled themselves. ()
Starship classes