Three sentry pods of the Mars Defense Perimeter in 2367

The Mars Defense Perimeter was part of the Federation planetary defenses of the Sol system. It was designed to protect the inner planets of the system, and specifically Earth, from intruding hostile starships. The defense perimeter consisted of a series of sentry pods.

In early 2367, an attacking Borg cube crossed the planetary defenses between Jupiter and Mars. It was able to easily break through the defensive lines, destroying the ships sent to intercept it within a matter of seconds. (TNG: "The Best of Both Worlds, Part II")

In 2368, a ship of the same type was stored in the ship graveyard of Surplus Depot Z15. (TNG: "Unification I")

The attack ships were called unmanned pods in the script of "The Best of Both Worlds, Part II". [1] In an alternative version of the scene, the Mars Defense Perimeter consisted of nine defense pods. All pods were destroyed by the Borg cube with rapid fire. The alternative scene was seen in the episode "Models and Miniatures" of the Discovery Channel show Movie Magic.
For information on history of this studio model, please see TNG studio models.

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