 Complete the following phrase:  Two other warships captured by Croatia, the Osa I class RČ-310 Velimir Škorpik and the Shershen class TČ-219 Streljko were not regarded as seaworthy and were eventually sunk by the missile boats Kralj Petar Krešimir IV and OBM-41 Dubrovnik in October 1994, during a live firing exercise known as Operation Posejdon. The main actions of the new Croatian navy during the war of independence were the lifting of the Yugoslav blockade of Dalmatia and the 