The Science Vessel is the terran mobile detector unit. It can be used a little bit asa an attack unit with Irradiate on non-mechanical units such as Marines. Or you can use EMP-Shockwave on protoss to remove their sheilds. the Sience Vessel is a unit that you should only make one or two of becuase of it's cost. I like to use it with two Wraiths around my base as a nuclear prevention squad. You do this by if you are nuked take those people over to the area where you are being nuked, find the Ghost and destroy it before the nuke hits.
