The Cordyceps-class (named after the fungus, apologies for the misspelling) is a small, long distance ship intentionally built for latching onto warships and hijacking their systems. The ship is small, fast, but lightly armed.
Unfortunately, they were far too easy to counter, being larger targets than starfighters. salvagers and pirates favor them as they can fix damaged systems of starship wrecks, allowing the scavenger to fly the wreck to a scrapping port.
Hijacker IV is Avari's first ship, cobbled together from the remains of cordyceps wrecks, one of which was Hijacker III