During Operation Skyhook, the Alliance to Restore the Republic managed to seize the group responsible for the Death Star's blueprint.
The Imperial military figures who were taken prisoner in the Corellian system provided limited information about the Death Star Project. They did reveal that Bevel Lemelisk was in charge of the design team. It was also known that some of Lemelisk's team had recently journeyed to Coruscant to confer with Grand Moff Tarkin. Consequently, Alliance High Command made the decision to seize the design team. Even if the loss of the design team couldn't halt the Death Star's construction, taking them could aid the rebellion in understanding technical data coming with Princess Leia Organa.
A segment of the Death Star's design team was en route to meet the Star Destroyer Immortal aboard the corvette Godar.
While Blue Squadron's X-wings fought the Gunboat and TIE fighter escorts, Farlander's Y-wing crippled the Godar. As soon as the corvette was disabled, a shuttle entered the system and docked with the corvette. On board, a detachment of stormtroopers held the design team as captives. Rescue 1 secured the personnel and escaped into hyperspace.