Zoom out far enough so you see the symbol and not the ships themselves. Then you can see where they are. To attack, disable the combat animations in the options. I know it sucks, but at least you can play the game...
A bit late perhaps, but I have the same problem with custom ships named the same as a previous custom ship created with a previous version of DA. That sounds a bit confusing, so let me give an example: In beta-DA I created a class called "Tiny Mk2" Now in v1.5 if I create a ship named "Tiny Mk2" and overwrite the previous class, I will end up with a ship with no icon. If I now create a ship called "Tiny Mk3" it will have an icon and if I create a new ship called "Tiny Mk3" and
