Omnidirectional antenna

An omnidirectional antenna was a piece of advanced communications technology aboard NASA's Mariner 2 space probe when it was launched in the mid-20th century.

A schematic of the Mariner 2 spacecraft depicting the location of the omnidirectional antenna was stored in the USS Enterprise (NCC-1701)'s library computer database. This database was accessed by the Talosians in 2254.