As others have said, it's probably the realy slim hull the Junker sports, well, it realy is just that tbh, most gatling fire will miss it if you are not firing from an optimal angle, that being from slightly above or slightly bellow and that it also sports a bulky armor, yet it's still a massive Hwacha target (A single volley will probably disable anything you have on it, unlike other ships where you can save at least half your components) and is pretty slow as well, but like most ships, with a good crew it can be absolutely awesome.