Hi YF
You can have more than 1 career running at anytime.
Archived careers that have not been deleted can be continued including Captains that have been transferred out of the game.
You need to click on New Career, enter a Captains name.
You can also change your starting date, year, but you must select the same year when you start your test mission in Eprobungstelle.
You should be able to select a boat type from the drop down box IIA or VIIB.
Peter