This is a drill...

I wonder how the German vessel simulated "acting in a way that merrited boarding".

clipped from www.aviationweek.com The Lebanese patrol boat, the Amchit, recently intercepted a Germany freighter, the Eschwege, off the country’s coast and directed the vessel into the Beirut harbor for closer inspection. There was concern on the part of the Lebanese about how the German vessel was acting, prompting the intercept. (credit: German navy)