As the Ottoman Empire I have tried to build and move some coastal guns and fortress artillery to forts and cities on the European continent, as it seems they can only be build on the Asian side of Turkey. However even though I have railroad connections from Asia (Turkey proper) to Europe near Istanbul I cannot move guns to these positions strategically, despite having enough railroad transport capacity. As a matter of fact it seems I cannot even move the guns towards any other position besides the place where they were built.
Does anyone know how to properly move them and/or build them as the Ottomans on the European continent?
Also are the coastal guns and fortress artillery in any way more special in their fighting capabilities than regular or heavy artillery and do coastal guns not share the same defensive capabilities as fortress artillery? Is it thus only for flavour that we have these two different fixed gun units?