The Antares-type was a small, multipurpose 23rd century Federation starship identified as a survey ship, transport, cargo and science-probe vessel. This class of vessel was commonly used during the 2260s. (TOS-R: "Charlie X") Ships of this class were listed in the Starfleet Registry. (TOS-R: "The Ultimate Computer")
In 2266, the USS Enterprise rendezvoused with the Antares. The Antares was later destroyed when its previously warped baffle plate was removed by Charlie Evans, the ship's former passenger. (TOS-R: "Charlie X")
In 2269, the Enterprise was assigned to escort two robot grain ships carrying a load of quintotriticale to the Sherman's Planet to assist in the survival of the colonists who were experiencing crop loss and famine.
During an encounter with the IKS Gr'oth under the command of Captain Koloth, one of the ships was disabled, and its cargo was transferred to the Enterprise. The Gr'oth later returned and attacked the second ship, disabling its propulsion systems as well. The ship was later recovered and towed by the Enterprise to Sherman's Planet. (TAS: "More Tribbles, More Troubles")
The Antares-type was fairly complicated in overall design. It was constructed on a horizontal spaceframe with the standard two-nacelle configuration. Jutting above and below the main spaceframe were the ship's cargo holds, with the largest being located below the axis of the vessel. The forward living section for a standard crew of twenty and bridge were located in the foremost position of the vessel. The deflector dish was centered in between the bottom of the forward living section and the bottom of the ship (TOS-R: "Charlie X")
The Antares-type was smaller in size than a Constitution-class starship, however, overall it possessed much larger cargo holds than were found in the latter design. (TOS-R: "Charlie X"; TAS: "More Tribbles, More Troubles")
Antares-type ships were easily convertable to automation, with the removal of the forward bridge section. These automated vessels were essentially flying cargo holds. (TOS-R: "The Ultimate Computer"; TAS: "More Tribbles, More Troubles")
Ships of the class Edit
- NCC-G1465 (variant)
Background information Edit
The Antares-type originally existed as the robot grain ship, which originally appeared in The Animated Series. This class was the second Federation starship design, at the time, to appear in the Star Trek franchise.
The final draft of the episode script of "More Tribbles, More Troubles" (dated 23 April 1973) describes these "robot grain ships" as "two identical crop carrying robot ships, not as big as the Enterprise, but every bit as powerful. Because they have no life support modules, they can use all their power for payload."
The original animated design heavily inspired the CGI model of the Antares, which appeared in the remastering of "Charlie X," and "Court Martial," while essentially the same model, the remastered Antares had a bridge and living section amended to the body of the original design. The front extension as a crew module was confirmed by producer Dave Rossi in an interview. 
A CGI version, of what could be considered identical to the "robot grain ship," was created, or rather modified from the Antares design, for an appearance as the Woden in the remastered episode "The Ultimate Computer", replacing recycled footage of the SS Botany Bay from "Space Seed".
According to the Star Trek Encyclopedia, (3rd ed., p. 470) the starship class of the Antares in "Charlie X" was called Antares-class.
According to Doug Drexler, on notes on his Facebook page, the Antares-type freighter was an older class of ship than the USS Enterprise. These ships measured 470 feet in length, with the crew module, and 343 feet in length, without the crew module. For the Antares and Yorkshire, the name was on the side of the crew module, whereas, for the Woden, the name was on the side of the main hull.