A record of the launch and flight plans for Ranger 3 through 5 were available in the Enterprise library computer, as well as pictures and plan views of three distinct versions of this design. This data was flashed on a viewscreen when the Talosians scanned the Enterprise computer in 2254. (TOS: "The Cage")
Ranger Block I
Components for the Block I included: ion chamber, omni antenna, magnetometer, Lyman Alpha telescope, Earth sensor, antenna gear box, solar panels, high-gain antenna, electrostatic analyzer, and sun sensor. (TOS: "The Cage")
Ranger Block II
The Ranger Block II was used in the second series of launches in the Ranger program designed for achieving Lunar orbit. Ranger 5 was one such probe in this series.
Components for the Block II included: lunar capsule, omnidirectional antenna, RADAR altimeter, solar panels, thermal shroud, gamma-ray spectrometer, midcourse motor, retrorocket, TV camera and high-gain antenna. (TOS: "The Cage")
Ranger Block III
Some historical craft named Ranger have been the namesakes for starfaring vessels and Federation starships in numerous non-canon works and games. A Ranger-class starship was part of the FASA RPG, appearing in such sources as the Federation Ship Recognition Manual. A different, earlier, Ranger-class based on an unused Matt Jefferies starship design was part of the Last Unicorn Games ship list, appearing in the Starfleet Operations Manual, among others. A Template:ShipClass USS Ranger appears in Star Trek: Shattered Universe and Star Trek: New Worlds promotional material.