There's two Soyuz spacecraft in case things go bad.
If you are aware of a plan to use a Dragon as a lifeboat, please bring out some sources for that.
That's a pretty far fetched possibility and surviving re-entry in an unmanned capsule is unlikely. There aren't any life support capabilities (ie. oxygen for breathing) and surviving the 5-10 G accelerations of re-entry would be rather unlikely without being strapped to a seat.
Can the Dragon spacecraft even undock from the space station and robotic arm without a human operator on the Canadarm controls?
If you are aware of a plan to use a Dragon as a lifeboat, please bring out some sources for that.
That's a pretty far fetched possibility and surviving re-entry in an unmanned capsule is unlikely. There aren't any life support capabilities (ie. oxygen for breathing) and surviving the 5-10 G accelerations of re-entry would be rather unlikely without being strapped to a seat.
Can the Dragon spacecraft even undock from the space station and robotic arm without a human operator on the Canadarm controls?