675 test zone

A 675 test zone was a code utilized by the Galactic Empire during the Galactic Civil War. In 4 BBY, the Empire employed a 675 test zone in the Del Zennis system, while Admiral Brom Titus tested the Interdictor, a prototype Interdictor-class heavy cruiser, and its gravity well system to ensnare passing rebel organizations. Around that time, the test zone remained restricted to unauthorized Imperial personnel, such as the original crew of Sentinel-class landing craft Shuttle S257.

While testing the starship, the Interdictor and its test zone were breached by vessels of Phoenix Cell, including the CR90 corvette Liberator commanded by rebel Commander Jun Sato. After his capture, Jedi Padawan Kanan Jarrus and former Clone Captain Rex covertly entered the 675 test zone aboard Shuttle S257. Bombarding the Interdictor's crew with various codes in order to board, using priority protocol 7-10-niner-5 to gain emergency access, the two were able to get aboard the Star Destroyer and free the rebel prisoners.

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