Please read Panama Marine circular 138. that is enough to understand, why and when we need to make new card.
fold a piece of paper and draw on it!!!!!!!!!! Design the pattern, pringting the graphic then cutting the shape.
use paper and fold it and color or paint
Follow this link and you can see. http://www.woodenboat.com/
There are tons of ways to make cards, but if you want a homemade one, you can go on the internet and find templates and then create one and print it out. If you don't want to use a computer, then you...