Here’s Galrahn at the USNI blog on stealth at sea:
Why is it the US Navy has spent billions to develop an incomplete stealth capability while our enemy has spent nothing and exploits stealth in every hijacking off the coast of Somalia?
Good point. Stealth mainly is something you do, not something you make. A submarine is stealthy due to its ability to submerge and run silent. Likewise are small warships, because they are small, and can “shoot and scoot”!