A rare and unusual unrat not neccesarily tied to the unrat captains, this unit and his supporting squad can be found chasing down convoys and disrupting trade lanes. The group consists of 3 standard [randomized] unrat fighters and a specialized unrat marauder.

Unrat Special Heavy Assault Marauder:
Armor: 11000
Mass: 4600 kg
Thrust: 210 N
Turbo Thrust: 200 N
Max Speed: 65 m/s
Weapons: 1 Ice flare, 2 Gauss III
Unique: Noticably resistant to energy damage

This group has a low chance of spawning in greyspace in a non-station sector a convoy is travelling, and will harass any ships in the sector until destroyed, or timing out [an hour?]. nearby stations could offer creditary rewards via bounty or mission to have the group destroyed.