Self Explanatory - This is a drone that will act similarly to a mining drone. It will whizz over to a wreck and it will latch its claws or tractor beam onto the wreck and then slowly bring it back to the mother ship - it will continue to drag the wreck until brought back to bay or re-ordered.
It will not be as slow as a mining drone with ore, but will slow down once it grabs its target. It could potentially be sorted into ‘size’ or have smaller drones require multiples to work. IE: A large wreck would require 5 light drones to pull, where as 1 heavy drone could pull it. Where as 2 or 3 mediums for a large wreck and 1 medium for a cruiser wreck.
The advantage of this method is it allows for individuals to make a profession ‘stealing’ wrecks. Or otherwise recover risky wrecks. It can also allow non-specialized salvage ships the option to bring wrecks in closer for salvaging without the need of an MTU.
I would not expect these to be used all the time, maybe even Niche use. But I think more options is always useful and adds extra flavor.