A ro-ro cargo vessel was underway. At about 20.00, the engineer of the watch (EOW) left the engine control room (ECR) and started his hourly rounds of the engine room and machinery spaces. Shortly after entering the purifier room, he heard loud metallic knocking sounds coming from the engine room.
Meanwhile, vibrations were being felt on the bridge by the OOW. He immediately reduced the controllable pitch propeller (CPP) from 60% to 25%. He then saw that the fuel consumption meter was also...