From "Blakes 7: Time Squad (#1.4)"
They've built a vast transceiver complex there. All Federation signals and navigation controls are beamed into Saurian Major, boosted and redirected. It's a vital nerve center in the Federation space control system. Destroy that, and you blind, deafen and silence them. That's what we're going to do.
A blow for freedom.
Yes, our freedom. For a clever man you're not very bright. Deaf, dumb and blind how are they going to catch us?
I'm sure Blake will manage it somehow.