The spacecraft was classified by the Federation as a Class 9 cargo vessel. The Erstwhile had a type 034 structure with a tritanium hull. It had type 02 fusion propulsion capable of accelerating the ship to a speed of 0.02 times the speed of light. The ship was armed with a primitive 2.3 megawatt laser array with four emitters. The gross vehicle mass of the craft was 23,200 metric tons.
In 2365, the Erstwhile experienced a burnout in its guidance system while traversing between the twin planets of the Omega Sagitta system. When the ship was intercepted by the Federation starship, USS Enterprise-D, the Erstwhile was traveling at .02 c of impulse on a course of 232.2 mark 2. The crew of the Enterprise offered Okona assistance with his repairs. (TNG: "The Outrageous Okona")
The side footage of the original studio model of the Erstwhile, a reuse of the Batris model, was not used in the remastered edition of "The Outrageous Okona", as filming elements were missing for the upgrade. A similar, yet slightly different, CGI model was used in the TNG Season 2 Blu-ray release instead.
The LCARS screen of Enterprise's scan of the vessel, that appeared directly before the green wire-frame display was sold at auction. Originating from Doug Drexler's own personal collection that graphic was sold as Lot 82 in Propworx' The official STAR TREK prop and costume auction of 8 August 2010 for US$420 (including buyer's premium), having had an estimate of US$400-$600.