If you read one of my earlier posts you will know that I bought one of Steve Webbs Submarines off Ebay. The model is a German class 202 coastal U-Boat S-173. Steve had already started to fit this out but had not completed it. His son Nigel has been very helpful and provided me with as much information as he could find but I am struggling to get my head around what type of ballast system Steve was fitting. I have added some pictures of what is already in the hull and any help anyone could give would be most appreciated. I would like to complete the build as near to what Steve intended but I am open to suggestions. Am I right in thinking a vented system was intended, I hope the pictures help.
![Help with ballast system Dscn0111](https://i.servimg.com/u/f39/18/99/42/79/dscn0111.jpg)
![Help with ballast system Dscn0112](https://i.servimg.com/u/f39/18/99/42/79/dscn0112.jpg)
![Help with ballast system Dscn0113](https://i.servimg.com/u/f39/18/99/42/79/dscn0113.jpg)
![Help with ballast system Dscn0111](https://i.servimg.com/u/f39/18/99/42/79/dscn0111.jpg)
![Help with ballast system Dscn0112](https://i.servimg.com/u/f39/18/99/42/79/dscn0112.jpg)
![Help with ballast system Dscn0113](https://i.servimg.com/u/f39/18/99/42/79/dscn0113.jpg)
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