D'Vahl type
The D'Vahl-type was a class of Vulcan starship utilized from the mid-20th through the mid-22nd centuries. This multipurpose vessel served as a survey vessel during the late-1950s. () During the 2150s, it was used by the Vulcan High Command as a patrol ship utilized for patrol duties and orbital defense of . ()

History 
The D'Vahl, a vessel of this type, first visited Earth in 1957. ()

These vessels were among the ships that welcome  from its mission to the Delphic Expanse. ()

Two of these vessels engaged  after in launched from Enterprise, during an unauthorized attempt to land on Vulcan in 2154. ()

Several of these patrol ships accompanied the Vulcan fleet in a failed invasion of Andoria. ()

Technical information 
It was only slightly larger than a shuttlecraft, and was warp-capable. It had three nacelle-like engines, and a landing light mounted on its hull. ()

They were also armed with a type of particle beam weapon. These vessels had more advanced targeting sensors and better shielding than that found aboard Starfleet s. ()

Ships of the class 
Named
D'Vahl

Unnamed
 Unnamed D'Vahl type ships

Appearances

Appendices

Background information 

According to the final draft of the "Carbon Creek" script, dated , the D'Vahl was visually identified as a Vulcan transport, however, a hand-written note, on the post-production version of same script, finalized the classification of the D'Vahl in dialog as a "Vulcan survey vessel". 

In the script of "Awakening", this type of craft was consistently referred to as a "Vulcan patrol ship". They should not be confused with the Vulcan patrol craft, a type of aircraft mentioned through the same three episode arc.

This studio model appeared as both the 20th century survey vessel and later appeared, unmodified, as a 22nd century patrol ship. This design by Doug Drexler, who described the model as a "Vulcan D'Vahl Type Fighter", and described it as "[exhibiting] a rotund penguiny quality fused with the  from [], and  [sic] moonship from []."

The studio model was created as a CGI model at Eden FX, the only remaining visual effects company working on televised Star Trek at the time, and which was re-utilized for print publication purposes when the design received its own outing as the "Vulcan Survey Vessel D'Vahl" in the British partwork publication, Star Trek: The Official Starships Collection, in 2019.

Further reading 
Star Trek: The Official Starships Collection, issue 155, July 2019

External link 
 

de:D'Vahl-Typ
ja:ドゥヴァール型
Vulcan starship classes