The Borg scout ship was a type of starship used by the Borg Collective. The ship massed approximately two-point-five million metric tons.
A small vessel of this type crashed inside the Argolis Cluster in 2368, where it was discovered by personnel from the USS Enterprise-D. The lone surviving drone (later named "Hugh" by the Enterprise crew) was rescued by Borg from a second scout ship, several days later. (TNG: "I Borg")
Axum was stationed aboard a Borg scout ship patrolling a border with fluidic space in a remote sector of the Beta Quadrant. (VOY: "Unimatrix Zero, Part II")