The D'Vahl was a Vulcan survey ship that was in service with the Vulcan High Command in the mid-20th century. In 1958, the D'Vahl was under the command of Captain Tellus. In January of that year, the D'Vahl visited Earth to rescue any survivors of a survey ship that crashed there. Of the three survivors, T'Mir, Stron, and Mestral, stranded there since October 1957, only two boarded the D'Vahl; Mestral, having elected to remain on Earth, was said to have perished in the crash as well. (ENT: "Carbon Creek")