The Raven-type starships were small, modular long-range Federation exploration vessels. They mildly resembled the Danube-class runabouts. They were designed to be operated by a minimum crew. According to the MSD of the USS Raven, this class also had a shuttlebay in the aft section.
The USS Raven was operated by two scientists – Erin and Magnus Hansen – for an extended period of time while in close proximity to a Borg cube. (VOY: "Dark Frontier") It's hull was partially composed of tritanium. (VOY: "The Raven")
- USS Raven (NAR-32450)
For the Raven's first appearance in "The Raven", Rick Sternbach admits the design was "not terribly well thought out," as it was only seen on screen in a crumpled and crashed state. The original studio model was rendered by Foundation Imaging, and unintentionally appeared to have 8 or 9 decks. For "Dark Frontier", Sternbach revised the design and had the windows rescaled so the model would have "four decks tops." (The master system display would go on to depict five decks.) Sternbach's other recommendations included the addition of four cargo bay doors, landing pads, and avoiding the use of the Starfleet arrowhead. (Star Trek: The Magazine Volume 1, Issue 1, p. 59)
The circular helm console of the ship appears to have been a reuse of the stock console used for USS Pasteur bridge. (citation needed • edit) The viewscreen appeared to be a reuse of the USS Enterprise-D's battle bridge. 
This type of vessel is listed in the Starships expansion volume of Decipher's Star Trek Roleplaying Game as an Aerie-class surveyor. It is also called Aerie-class in WizKids' Star Trek: Attack Wing game.
The design of the Raven also appears in Star Trek: Armada II as a colony ship.