From the FASA Star Trek FEDERATION SHIP RECOGNITION MANUAL, 1st Edition, circa 1983
Anton Class II Explorer / Science Vessel
Notes:  The Karekh class is a Vulcan-designed and manufactured exploration vessel.  This class was designed specifically for mapping space and performing related duties.  As a result, the Karekh has an unusually powerful computer for a starship of its size.  It is not a particularly well-known class, but it is very well suited for its mission.  The vessel’s overall reliability is one of its greatest strengths.  The interior configuration is similar to the more common Mission Class, except that the Karekh has two decks instead of three.
        As part of its mapping and patrol procedures, the Karekh locates new planetary systems.  After detecting a new system, the explorer investigates further and determines whether the planet is suitable for colonization, or needs further evaluation by a more fully-equipped starship.  Karekhs have made a great deal of celestial discoveries and first contacts, a source of satisfaction to Starfleet and the ship’s Vulcan builders.
        One notable difference between the Karekh Class and other Starfleet explorers and scouts is this vessel’s total lack of weaponry. This characteristic makes the ship very popular with Vulcan crews (for whom it was originally designed) and less popular with most other races.  In particular, no Andorians will serve willingly aboard a Karekh.
        Because it is unarmed, there are certain restrictions on the duties the Karekh may perform.  It is generally used to patrol, monitor, and explore ‘safe’ regions within the Federation, especially areas not deemed important enough to warrant a larger vessel.  The FSB deflector shields with the binary transducer systems are adequate protection against most unknown dangers, and the ship’s high speed protects it from anything it cannot handle via peaceful means.
        Most Karekhs serve with the Galactic Exploration Command, though a small number have also been assigned to the Merchant Marines and other Commands.  The design is currently being examined for the possibility of upgrading it to a Mk II with a more powerful impulse engine, a reinforced superstructure, and more efficient deflectors. The final re sults of this evaluation should be released by Stardate 2/2503.
        Of the 125 Karekhs built, 85 are serving with Galactic Exploration Command, 17 are serving with Merchant Marine Command, 3 are used by Star Fleet Training Command, and 12 are assigned to Star Fleet Intelligence.  Of the remainder, 2 have been destroyed, 1 is listed as missing, and 5 have been sold to private individuals.   The Karekh, manufactured at Vulcan, is no longer in production.  In the event the Karekh is upgraded, modifications will be made at the Sol IV and Vulcan shipyards..