In Bremenhaven is the Schiffahrtsmuseum Bremerhaven, the Maritime Museum Bremerhaven. The museum is focused on German Maritime history in general. They do have some objects related to World War One and World War Two but this is not their focus.
A midget submarine Seehund, the and a German Halftrack, the Sd.Kfz. 11 Raketenwagen can be seen for example.
In front of the museum is the museum ship – Uboat type XXI U-2540 Wilhem Bauer
Visit
Check out the openings times and the items on display on their website