Do you mean the one where you have to pull in the ship and then you get to keep said ship? I've seen it 3 times the last week or so. Of course, I've been playing almost non stop the whole time. That probably increased the odds in my favor a bit. Lol!
Hope that helps!
Is there any way tio trigger the event yourself or is it just random? If so are there to things you need to do first and/or have built? If it is random, is there any way to increase the odds of encountering it?