The Henndal was a Neh'vor-class science vessel that served with the Romulan Star Navy during the 24th century. In 2368, the Henndal was badly damaged while testing an experimental interphase cloaking device resulting it it been saved by the USS Enterprise-D. (Ship Recognition Manual, Volume 5: Starships of the Romulan Star Empire, TNG: "The Next Phase") In "The Next Phase" this vessel was not named.