I had three Gato-class fighters I gave away to the Drengin. Later I noticed I still had these Gato ships. I thought I would try to give them away again, but they weren't listed in the trade dialogue. But the ships were otherwise accessible and usable. Later, I decided to disband them, and I got the money for that. However, the ships were still there! Finally, I deleted the class and was finally rid of them.
Gato is Spanish for cat. Between the three ships, they truly had nine lives!
