Atlantis (OV-104) was delivered to Kennedy Space Center in April 1985. It lifted off on its maiden voyage on Oct. 3, 1985, on mission 51-J, the second dedicated Department of Defense flight. Later missions included the launch of the Galileo interplanetary probe to Jupiter on STS-34 in October 1989, and STS-37, with the Gamma Ray Observatory (GRO) as its primary payload, in April 1991.
Atlantis is named after a two-masted sailing ship that was operated for the Woods Hole Oceanographic Institute from 1930 to 1966.

NASA’s fourth space-rated space shuttle, OV-104 "Atlantis," was named after the two-masted boat that served as the primary research vessel for the Woods Hole Oceanographic Institute in Massachusetts from 1930 to 1966. The boat had a 17-member crew and accommodated up to five scientists who worked in two onboard laboratories, examining water samples and marine life. The crew also used the first electronic sounding devices to map the ocean floor.
Image to right: During its second major overhaul, Atlantis received the new Multifunction Electronic Display System, or "glass cockpit." Credit: NASA
Construction of the orbiter Atlantis began on March 3, 1980. Thanks to lessons learned in the construction and testing of orbiters Enterprise, Columbia and Challenger, Atlantis was completed in about half the time in man-hours spent on Columbia. This is largely attributed to the use of large thermal protection blankets on the orbiter’s upper body, rather than individual tiles requiring more attention.
Weighing in at 151,315 pounds when it rolled out of the assembly plant in Palmdale, Calif., Atlantis was nearly 3.5 tons lighter than Columbia. The new orbiter arrived at NASA’s Kennedy Space Center in Florida on April 9, 1985, and over the next seven months was prepared for her maiden voyage.
Like her seafaring predecessor, orbiter Atlantis has carried on the spirit of exploration with several important missions of her own. On Oct. 3, 1985, Atlantis launched on her first space flight, STS-51-J, with a classified payload for the U.S. Department of Defense. The vehicle went on to carry four more DOD payloads on later missions.
Image to left: Riding twin plumes of flame produced by its Solid Rocket Boosters, Space Shuttle Atlantis clears the tower as it launches on mission STS-46. Credit: NASA
Atlantis also served as the on-orbit launch site for many noteworthy spacecraft, including planetary probes Magellan and Galileo, as well as the Compton Gamma Ray Observatory. An impressive array of onboard science experiments took place during most missions to further enhance space research in low Earth orbit.
Starting with STS-71, Atlantis pioneered the Shuttle-Mir missions, flying the first seven missions to dock with the Russian space station. When linked, Atlantis and Mir together formed the largest spacecraft in orbit at the time. The missions to Mir included the first on-orbit U.S. crew exchanges, now a common occurrence on the International Space Station. On STS-79, the fourth docking mission, Atlantis ferried astronaut Shannon Lucid back to Earth after her record-setting 188 days in orbit aboard Mir.
In recent years, Atlantis has delivered several vital components to the International Space Station, including the U.S. laboratory module, Destiny, as well as the Joint Airlock Quest and multiple sections of the Integrated Truss structure that makes up the Station’s backbone. As NASA seeks to fulfill the Vision for Space Exploration, beginning with the completion of the Station, Atlantis will be called upon for many missions to come.
Construction Milestones - OV-104

Jan. 29, 1979
Contract Award

March 30, 1980
Start structural assembly of crew module

Nov. 23, 1981
Start structural assembly of aft-fuselage

June 13, 1983
Wings arrive at Palmdale from Grumman

Dec. 2, 1983
Start of Final Assembly

April 10, 1984
Completed final assembly

March 6, 1985
Rollout from Palmdale

April 3, 1985
Overland transport from Palmdale to Edwards

April 9, 1985
Delivery to Kennedy Space Center

Sept. 5, 1985
Flight Readiness Firing

Oct. 3, 1985
First Flight (STS-51-J)

Upgrades and Features
By early 2005, Atlantis had undergone two overhauls known as Orbiter Maintenance Down Periods. Some of the most significant upgrades and new features included:

• Installation of the drag chute
• New plumbing lines and electrical connections configuring the orbiter for extended duration missions
• New insulation for the main landing gear doors
• Improved nosewheel steering
• Preparations for the Mir Orbiter Docking System unit later installed at Kennedy
• Installation of the International Space Station airlock and Orbiter Docking System
• Installation of the Multifunction Electronic Display System, or "glass cockpit"