While in port, how often must the secured reduction gear be rotated with lubrication?

The correct answer, which indicates that the secured reduction gear must be rotated with lubrication weekly, is based on standard maintenance practices for machinery. Regular rotation of the reduction gear helps to ensure that the internal components are properly lubricated, preventing wear and tear due to friction and ensuring optimal performance when the equipment is needed.

Weekly lubrication maintenance is critical as it strikes a balance between ensuring components remain well-lubricated without overdoing it, which can lead to issues such as oil contamination or build-up. This routine helps maintain the integrity of the gear system, minimizes the potential for malfunction, and extends the life of the machinery.

Other options suggest frequencies either too often or too infrequent. Daily rotation could lead to unnecessary wear and increase the risk of oil issues, while monthly rotation may not provide sufficient oversight and maintenance, potentially leading to degradation of the machinery over time. Thus, a weekly schedule provides an ideal timeframe for upkeep and ensures operational reliability.