This is the Belgian lightship 2 West-Hinder II. It is on display at hte Seafront Maritime Park in Zeebrugge in Belgium. A submarine periscope had been installed in the stern of the lightship - I have really no idea why and in my opinion it is more then useless. What does a lightship need a submarine periscope for? Mr. Karl-Rainer Spitzer gave the answer and it is actually quite simple: During the record level of the tide, the largest part of the WEST-HINDER usually was under water because the ship was screwed to the Westhinder sandbank on the basis of a misunderstanding. So a periscope had been installed on the ship so the personnel could now see, when it became dark and they had to light the fire. However this situation passed only a few weeks, because it was very difficult to seal the ship in a way that it didn't run ful of water in every flood. They broke the lightship from the sandband, it swam on the waves like each other of its type. Attached a documentary photo from the initially days, which proves the result of my investigations ;o) Special thanks to Karl-Rainer Spitzer for his investigations and the great photo.