GR-75 medium transport

The GR-75 medium transport was a transport used by the Rebel Alliance during the Galactic Civil War. They were in use from the early days of the rebellion; one was destroyed on a supply mission to Teralov and two more were destroyed in the Battle of Atollon. At least ten transports served at the Battle of Scarif, and later in the war thirty served as escape craft during a partially successful attempt to evacuate rebel forces from an assault on Hoth, in which thirteen were able to escape. At least sixteen also participated in the decisive Battle of Endor.

The transport was controlled from a small bridge situated towards the rear of the craft, and by way of defenses sported both laser cannons and deflector shields.

By the time of the cold war, several GR-75 medium transports were in the service of Jinata Security, which were modified with additional laser cannons.

Behind the scenes
The GR-75 transport first appeared in Star Wars: Episode V The Empire Strikes Back. Ultimate Star Wars, published on April 28, 2015, identifies it as the GR-75 transport, but the official Databank entry lists it as a "GR-75 medium transport."

During production of The Empire Strikes Back, they were nicknamed "tuna ships," and the model had a slight pink cast. Despite being transports, they were included in the battle scenes of Star Wars: Episode VI Return of the Jedi because more ships were needed, but no in-universe explanation of their presence has been given.