From Ship Recognition Manual-The Federation (Second Printing), FASA

Notes - circa 2287:

     The Aakenn Class freighter entered service during the Four Years War, during which the Class was used to move men and materiel to the front and supplies to the rear to keep the Federation's wartime production at high levels. Presently, this freighter is a common sight on the space lanes, with thousands in commercial service. Star Fleet uses its more than 100,000 mt of capacity to move all sorts of materials to the outer reaches of the Federation; because the vessel is not landing-capable, all cargo must be containerized and beamed aboard using the vessel's 8 cargo transporters. As an added feature, the Aakenn has staterooms for up to 6 passengers; these small rooms, though not designed for luxurious travel, are reasonably comfortable.
     On Stardate 2/1309, the USS Mundy, was found adrift near Starbase 21. The vessel's onboard life support systems were operating, but there were no crewmembers aboard. The bridge area showed signs of a struggle, but nearly all computer files had been lost and there was no recorded data to reveal what had happened. The last entry in the Captain's Log, from about four months earlier, made no mention of any emergency or possible danger. When the cargo hold was breached, it was found to contain millions of live Tribbles, living on the food produced by a synthesizer that had somehow been left on. The "Tribble Ship", as it came to be called, was taken into Starbase 21 where it was learned that it had been stolen two years earlier. This mystery remained unsolved until Star-date 2/2205, when two of its crewmembers were found in a nearby asteroid cluster, somehow having been missed when the search parties checked the area for survivors. They revealed that they had been boarded by a band of renegade Klingons, who, when they discovered that the cargo was Tribbles, became so infuriated that they killed the captain and officers and left the crewmen on the asteroid.
     Of the 1,432 Aakenn Class freighters built, 244 Mk lls and 760 Mk IVs remain in active service and 12 Mk lIs are in reserve fleets. One Mk II and 4 Mk IVs are used by Star Fleet Training Command; 186 Mk lls and 102 Mk IVs have been destroyed; 17 Mk IIs and 8 Mk lVs are listed as missing; 119 Mk Ils and 71 Mk lVs have been scrapped; and 93 Mk lls and 32 Mk IVs have been sold to commercial enterprises. The Aakenn is manufactured at the Tellar, Proxima Centauri, and Cait facilities at a combined rate of 30 per year.