NATO was practicing close the Arctic. Participation of the Polish Navy

In mid-April, the Dynamic Mongoose 25 exercises led by the Allied NATO Maritime Command (MARCOM) began in northern Europe. Dynamic Mongoose is the largest and most intense yearly NATO exercises on the fight against submarines in the waters of North Europe, read MARCOM website. Not only submarines or frigates, but besides patrol aircraft, helicopters and coastguard ships are active in joint activities.