....you'd LOVE to have your product in the hands of the Israeli Navy. It's worth cash money to you in terms of convincing tinier militaries to buy the product. And when Israel USES one to do something spectactular (whether it reaches the general public's ears or not!) that is worth even more!
UN experts: North Korea continues to evade UN sanctions (AP)
from the article: Behind the scenes of Israel's new submarine deal with Germany