You are quite right Dirk and I PM'd you confirming that in January (and no Admin expressed a different view when I asked at the time).
You have had every opportunity to put these photos in the right category since then and I am not aware of any such changes made recently.
I will be clear. It is Admin responsibility to move photos when they are in a clearly wrong type category or subcategory (eg type of ship, year or size bracket), and unfortunately that has to be done all too often. And sometimes photos are moved in order to avoid deletion - for example, in Ships under Repair we allow obstructions where they are relevant to a repair yard.
However in some cases, members have a choice between the normal ship type category or a specialised one - for example scrapyard, casualty, repair, construction. Provided the image meets the appropriate site standards (especially whole-ship and obstruction) then a member is free to choose which category to select.