The very old Jane's All The World's Fighting Ships, prior to 1905, Jane had these little silhouette ink sketches of ships. They show the steam pipes and he points out differences between ships in the same class. I am not sure about the rights situation, but Jane's ship diagrams that show the armouring scheme are all over the internet, so I will try showing one of his little silhouettes. As an artist, I think that they are little gems. If you have not seen a Jane's from 1899 to 1904, you probably have not seen one of these silhouettes. I have thought that you could make wargame pieces that looked like this.