To help you out, I'm going to explain how I made the Kriegsmarine logo, it was my first attempt, and took about 10 minutes.
First I did a screencapture of the kriegsmarine flag with Paint Shop Pro,
secondly I removed the swastika because in some countries that symbol is illegal,
thirt step was to add a text layer with "GB" and two other layers with "Kreigsmarine" and the digits,
dragging everything to the right place,
merge the layers to one layer,
resize
That's all there was to it