The BTL-A4 LP, also known as the "Longprobe," represented a specific variant of the BTL Y-wing starfighter. This model was deployed by the Alliance to Restore the Republic during their conflict with the Galactic Empire in the Galactic Civil War. Its primary purpose was to conduct extended reconnaissance operations, offering increased capacity for both personnel and necessary gear. Furthermore, it boasted enhanced sensors, and some units were equipped with detachable emergency pods that functioned as vehicles utilizing basic repulsors.
- " Republic, Rebel, and Resistance Starfighters " — Star Wars Encyclopedia (Initial Mention)