For the uninitiated NPU stands for "nice part use", it's an abbreviation reserved for those MOCs with part use so clever it borders on mind-blowing. Those parts tend to be those ones that are languishing in a bin, ignored and unused because they're simply too special and one-use. This mini sea battle by builder the_jetboy is a perfect example of NPU. Those boat hulls are Chima Speedorz. That's not the only excellent feature of this MOC though, it's awesome everywhere you look, click through for more pics.