space ping
Hmm. Coupla years ago, I saw some chatter on the net about an idea to inject plasma into a magnetic field to inflate it large enough to act as a solar sail. Point being that instead of building a large, delicate sail to be pushed around by the sun, you could have a magnetic one that you could turn on or off at will, and possibly shape to provide thrust in specific directions.
Seems like that sort of thing would fit right in here.
Deflector array?