Tugs

'Tug' is the generic term used to refer to the atomic-powered mass-driver driven spacecraft used in the Bountiful Sky Project.

History
The components of the first tugs were lifted into orbit onboard the Bullets.

Crop Tugs
Built to de-orbit re-entry vehicles

Ore Tugs
Built to assist loads of ore from low lunar orbit to the main hab. The necessary delta-V was supplied by tether launch, using the mass of the tug itself as the counterweight. After launch, the tug used its mass-driver engine to return to station.