 Complete the following phrase:  She returned to Norwegian waters after her refit and conducted several minelaying missions between 19 and 28 June together with Z27. The ship took part in Operation Zitronella, the German raid on the island of Spitsbergen in September where she was hit by coastal artillery and slightly damaged. Z30 was one of the escorts for the battleship during Operation Ostfront on 25 December, an attempt to intercept the British 