What action to be taken in case of stern tube lube oil water contamnation?

In the event of stern tube lube oil water contamination, the first step is to stop the affected machinery and isolate the contaminated system. Next, the source of the contamination should be identified and rectified. The contaminated oil should be drained, and a thorough cleaning of the system should be performed before refilling with fresh lube oil. Additionally, monitoring equipment should be checked for any damage, and operational procedures should be reviewed to prevent future occurrences.