Much planning was done. Explorers, chiefly the Rogue Trader, decided that a bit of revenge against an old enemy of his dynasty was in order.
To this end, they attempted astropathic contact with the rogue trader’s uncle. The first attempt resulted in the astropath driving everyone in the room (except himself) a tiny bit insane with sudden mad whispers of the warp that resulted from his telepathic misdial.
The rogue trader acquired a malignancy; an unfortunate tendency to picture morbid scenes of his enemies undergoing horrendous torture.
Second attempt worked out, and some time later the explorers were informed of the location of one of the enterprises of the dynastic enemy in question.
The explorers journeyed to the system in question, suffering only a minor mishap as a hallucinating arch militant torched his own quarters.
Upon arrival in the system, the explorers set to locating what their enemy’s enterprise might be in the system. After some searching, they located an enemy ship, hiding in an asteroid field.
They engaged the ship, and the clever mine-based trap that it was supposed to trigger got cancelled on account of their disruptor macrocannons completely frying every single command and communications system on the ship. From this point, the space battle was a bit one-sided, and ended with eventual complete power failure on the enemy ship.
And then the session ended.
Future space encounters should account for the immensely annoying weapon that is the disruptor macrocannon. Plastic ships, perhaps.