Board Thread:Questions and Answers/@comment-27011882-20151219122911/@comment-26091666-20151223232247

Just to make a rather small point here even if obvious is that doing Z1 quest chain only provides:
 * Z1 upon quest completion,
 * the ability to construct Z3 via normal construction, and
 * the ability to construct Bismarck via Large Ship Construction (LSC).

As of writing, the three other German ships that are also available in the game but are currently unavailable via construction or any particular quest(s) are:
 * Prinz Eugen,
 * U-511, as well as
 * Graf Zeppelin