The process of shipping the submarines by rail involved breaking the submarines down into what was essentially a knock down kit. Each boat was broken into approximately fifteen pieces and loaded onto eight railway flatcars. Type UB I boats destined for service with the Flanders Flotilla  made a five-day journey to Antwerp for the two- to three-week assembly process.
The transportation of submarines by rail involved disassembling them into a modular format, consisting of approximately fifteen parts per vessel. These components were then loaded onto eight railway flatcars and transported to Antwerp, where they would undergo a two- to three-week reassembly process for Type UB I boats destined for the Flanders Flotilla.