And, that might work pretty well. At least on the starboard side, the bow number is white over black. I couldn't find a pic of the port side with a number, but the choices of background are black, white or Ocean Gray.
Don, I'm curious. It sounds like you run decal paper through the printer multiple times? I've never tried that. I have a pretty expensive printer that tends to jam on stuff like used print paper, so I hesitate.
Once I needed a bunch of white stars, so I printed them in outline on the back of the paper and cut them out upside down. It worked nicely.
Doing the math, these numbers are pretty small. 0.06 inches tall.
Cap'n- why do ships have hull numbers? Using the 1" per 50 foot rule we signage designers follow, on a clear day, these would be legible unaided at no more than about a quarter mile, and that's really pushing it.
She flies her call sign flags, right?