Actually saw that on a helicopter once, the AM guys painted 554 on one side then knocked off for the night, next day painted 557 on the other side. This was on a shore station so a night at the enlisted club was probably a factor. (HIC!)
I still don't have 1.5 yet so no SH4 Das Boot, but when I played SH1 through SH3 the type VII was my favorite too.
