The Cosmos-class was a type of survey ship starship in service to Earth Starfleet and Federation Starfleet in the mid-to-late 22nd century. (TOS reference: Spaceflight Chronology)

Service history

The Cosmos-class had a crew of 100 and a mass of nearly 36,700 tons. It entered service on reference stardate 0/8207. A total of 103 were built. They remained in service until reference stardate 1/20. (TOS reference: Spaceflight Chronology, FASA RPG module: The Romulan War)

Both Spaceflight Chronology and the FASA RPG use a timeline in which the Romulan War occurred nearly 20 years after the foundation of the Federation, with the Cosmos-class being a ship of the Federation Starfleet. However, Star Trek: Enterprise later canonically placed the Romulan War shortly before foundation, 2155–2160. Adapting the Cosmos-class to this chronology suggests that it began as an Earth Starfleet vessel, entering service c. 2151.

Appendices

Connections

Starship classes of the Earth-Romulan War
United Earth, Starfleet	Arrow • Assist • Cavalry • Christopher • Cosmos • Daedalus • Discovery • Doppler (scout) • Edison (research ship) • Galliant • Ganges • Hopkins • Horizon • Intrepid (22nd century) • Liberty (picket cruiser) • Long • Marshall • Mercury (scout) • Messier • Minuteman • NX • Poseidon • Strider • Verne (Earth) • Vanguard (transport) • Yorktown • Zeus
Coalition of Planets allies	Alpha Centauri Concordium of Planets: Djartanna • Zoenamy	Andorian Empire: Kumari • Taholsin • Tanathooef • Thofsin
	United Planets of Tellar: Degbaxis • G'buqoff • Phinda	Confederacy of Vulcan: D'Kyr • Suurok • Toj Lol
Romulan Star Empire, Imperial Fleet	22nd century bird-of-prey • 2150s bird-of-prey • late-2150s bird-of-prey • 22nd century cargo ship • biogenic transport • Alocala • Battlehawk • Hathos • Klivai Vang'radai • Morlasam Cl'vangas • Re'ravsam • Skyhawk • Stelai'deletham • S'ten Talasam • Swarm • Swiftwing • Takaan • T'Liss • Vas'maklaram • Vas'rosvlai • Vastagor Vastarum • Vastari Sanalam

Starship classes of the Spaceflight Chronology
United Nations, United Earth	Assist-class • Aventeur-class • Belmont-class • Cochrane-class • Columbus-class • Companion-class • Cosmos-class • DY-500-class • Edison-class • Franklin-class • Galileo-class • Gallant-class • Glenn-class • Horizon-class • Keller-class • Liberty (picket cruiser) • Lindbergh-class • Long-class • Magellan-class • Merchant-class • Messier-class • Monticello-class • Parr-class • Saratoga-class • Wheeler-class • Vanguard-class • Verne-class
Federation, Starfleet	Advance-class • Baton Rouge-class • Bode-class • Bradley-class • Broadway-class • Byrne-class • Cabot-class • Calvary-class • Canopus-class • Castor-class • Clark-class • Constitution-class • Chariot-class • Declaration-class • Doppler-class • Eagle-class • Hale-class • Hopkins-class • Hunter-class • Libran-class • Lowell-class • Mann-class • Marshall-class • Master-class • Mercury-class • McCormick-class • Messier-class • Newton-class • Normandy-class • Palomar-class • Pointer-class • Portsmith-class • Powers-class • Placido-class • Provider-class • Rickenbacker-class • Sawyer-class • Stellarford-class • Tritium-class • University-class • Voyager-class • Watt-class

Starship classes and spacecraft types of Earth

Arrow • Assist • Cavalry • Christopher • Cosmos • CZ-100 • DY-100 • DY-500 • DY-700 • DY-1100-class • Daedalus • Discovery • Doppler (scout) • Edison (research ship) • Galliant • Ganges • Hopkins • Horizon • Intrepid (22nd century) • J (freighter) • Liberty (picket cruiser) • Long • Marshall • Mercury (scout) • Messier • Minuteman • Neptune • NX • Poseidon • Strider • Vanguard (transport) • Verne (Earth) • Y (freighter) • Yorktown • Zeus

Starship classes of the Coalition of Planets

Arrow • Assist • Cavalry • Christopher • Cosmos • Daedalus • Degbaxis • Discovery • Djartanna • Doppler (scout) • Edison (research ship) • Galliant • G'buqoff • Hopkins • Horizon • Intrepid (22nd century) • Liberty (picket cruiser) • Long • Marshall • Mercury (scout) • Messier • Minuteman • NX • Poseidon • Strider • Taholsin • Tanathooef • Thofsin • Toj Lol • Vanguard (transport) • Verne • Yorktown • Zeus • Zoenamy