Click here for Wookieepedia's article on the Canon version of this subject.  This article covers the Legends version of this subject. 

OnALegendsArticleGoToCanon

"Admiral, we have enemy ships in Sector 47."
"It's a trap!"
―Verrack and Gial Ackbar[1]

Sector 47 was an area of space within the Endor system. During the Battle of Endor in the Galactic Civil War, the Galacitc Empire's Star Destroyers were located in Sector 47 and ambushed the Rebel Fleet. Captain Verrack[2] informed Admiral Gial Ackbar about the location of the Imperial vessels.[1]

Behind the scenes

"Admiral, we have enemy ships at Sector RT-23 and PB-4."
"It's a trap. Prepare for attack."
―Verrack and Gial Ackbar[3]

Sector 47 was not mentioned in the 1983 novelization of Star Wars: Episode VI Return of the Jedi. Instead, the Mon Calamari controller mentions Sector RT-23 and Sector PB-4.[3]

Appearances

Notes and references