Callisto class

## SPACECRAFT CLASS

The ***Callisto*-class** was a type of spacecraft developed by Starfleet in the early 25th century. It was a sister design of the *Aquarius*-class, but had a more tactical focus.

## History

During the Last Federation-Klingon War, Starfleet Command saw the need for a corvette that could be quickly produced and deployed to support larger corvettes in patrol and escort duties. As the war waned, the idea was sidelined until engineers at the San Francisco Fleet Yards revisited it as part of a plan to revamp the *Odyssey*-class design. The new series of designs for the cruiser called for a large, berthed, support craft, which fit the profile of a corvette.

The lead designer assigned to developing the new craft took inspiration from *Sydney*-class transports flown by his grandfather. Using the same basic hull shape, the new *Aquarius*-class made use of the latest technologies and included variable-geometry pylons to improve warp efficiency and allow for a smaller docking profile.

When the *Aquarius*-class was presented to Starfleet Command it was quickly approved, but with the added request that an additional design be developed that could operate more independently. Though the initial design had a wide range of operability, the designers revisited it and decided to go with a fixed-wing layout that allowed them to make use of more powerful warp engines.

The new *Callisto*-class provided the versatility implemented in the *Aquarius*-class, but with added range and speed. A dozen hulls were ordered of both designs and they entered service in 2409.

The project lead on the update to the *Jupiter*-class also saw the benefit in designing the new carrier to hold several *Callisto* corvettes.

## Technical specifications

### Deck plan

The following was the standard internal layout of *Callisto*-class vessels.

 2
 3
 4

### Tactical systems

The defenses of the *Callisto*-class were provided by an ablative neutronium alloy hull and two Stalwart 88L Unified Deflector Field Emitter Arrays.

*Callisto* corvettes were heavily armed for their size. They bore two, forward-facing type-XII pulse phaser cannons, eight type-X Annular Confinement Beam-jacketed phaser arrays, and four variable-payload launch tubes.

## Appendices

### Connections

**Project groups:** **Union Station** (*Geneva* • *Concorde* • *Presidio*) • **Century Cruiser** (*Springfield* • *New Orleans* • *Challenger* • *Niagara* • *Freedom II* • *Galaxy* • *Nebula* • *Cheyenne*) • **Multi-Mission explorers** (*Brigid* • *Esquiline* • *Palatine*) • **Deep Shadow** (*Eclipse* • *Phantom* • *Scryer*) • **Miracle Worker** (*Scott* • *Daystrom* • *Tucker* • *Gagarin*) • **Aeronaut** (*Mercury* • *Ajax* • *Icarus* • *Shran*)

**Other named classes:** *Aegian* • *Aerie* • *Akula* • *Atlas* • *California* • *Centaur* • *Challenger* • *Cheyenne* • *Constellation* • *Constitution III* • *Crossfield* • *Curry* • *Daedalus* • *Dauntless* • *Excelsior II* • *Freedom II* • *Gemini* • *Glenn* • *Guardian* • *Inquiry* • *Iwo Jima* • *Jupiter* • *Lexington* • *Niagara* • *Obena* • *Okinawa* • *Parliament* • *Perseus* • *Pioneer* • *Ranger* • *Sagan* • *Solanae* • *Springfield* • *Turing* • *Ulysses*

**Auxiliary craft:** *Aero* • Class C • Class F • *Danube* • *Flyer* • *Gondola* • *Kodai* • *Mollard* • *Peregrine* • *Selenic* • Type 4 • Type 5 • Type 6 (Type 6A • Type 6S) • Type 7 • Type 8 • Type 9 (Type 9A) • Type 10 • Type 11 • Type 14 • Type 17 • Type 19 • *Valkyrie* • *Venture* • *Waverider* • *Yellowstone*

**Leadership:** Commander-in-chief • Joint Chiefs • Chief of Starfleet External Affairs • Chief of Starfleet Operations • Chief of Starfleet Research and Exploration • Chief of Starfleet Tactical

**Agencies:** Operations (Engineering • Judicial • Materiel Supply • Mission Operations • Personnel Management • Records Service • Shipyards Operations • Starbase Operations) • Research & Exploration (Science • Medical) • External Affairs • Tactical (Intelligence • Security • MACO)

**Notable units:** Ktarn Fleet • Task Force 77

**Facilities:** Deep Space K-7 • Deep Space K-13 • Deep Space 9 • Masamichi Array • Starbase 45-Keepsake • Starbase 82-Maat • Starbase 234-Beskerm • Starbase 247-Vershina

**Agencies:** Starfleet • Diplomatic Corps • Department of Temporal Investigations • Federation Security Agency

**Facilities:** 40 Eridani A Starfleet Construction Yards • Antares Ship Yards • Beta Antares Ship Yards • Copernicus Ship Yards • Laikan Starfleet Shipyards • McKinley Station • Memory Project • New Aberdeen Shipyards • Proxima Maintenance Yards • Salazaar Shipyards • San Francisco Fleet Yards • TL-9139 Starfleet Maintenance Yards • Tranquility Base • Utopia Planitia Fleet Yards

### Sources consulted

* Callisto Light Escorts article at the *Star Trek Online Wiki*.

### Footnotes

1. ↑ Derived from Aquarius layout by Wild-Endeavour and MSD created by Lee Arundel.