The Keen-Bastion Picket Ship is a small, two person operated early warning and control vehicle that operates as a mobile, ad hoc command center for situations with long Earth-communication delay. Crews usually operate on 25 day rotations due to the dangers of prolonged space flight.
Modular in design, the basic KB Class includes a powerful sensor array, 2 person operations center, living quarters with supplies for six weeks isolation and a primary booster that can be jettisoned if needed for crew safety.