Abstract:
Ship operations during anchoring are highly dependent on the performance of deck
machinery systems, particularly the anchor windlass. This system plays a crucial role in
withstanding the tension of the anchor chain and ensuring the vessel can anchor safely,
while maintaining the ship's position against excessive movement caused by extreme
weather conditions. This study aims to identify and analyze the root causes of
operational failures, specifically the damage to the windlass motor ball bearings due to
chain tension exceeding design capacity limits, as well as severe wear on the chain
stopper bearing surface triggered by repetitive impacts and shock loads. This study
employs a descriptive qualitative method using the Fishbone Analysis approach, based
on the author's sea project experience (Praktik Laut) aboard MV GLOVIS DAYLIGHT.
During the internship, cases of anchor dragging and a breakdown of the port-side
windlass motor were identified, caused by heavy swells and strong winds in the waters
of Port Kembla, Australia. The results of this research are expected to provide effective
handling and problem-solving practices through the implementation of a VFD-based
Load Monitoring System to dampen shock loads and the use of the Hard-facing Coating
method to increase the durability of the chain stopper material. These mitigation steps
are expected to prevent premature mechanical damage, maintain the smoothness of
anchoring operations, and ensure ship safety.
Keywords: Ball bearing damage, Chain stopper wear, Anchor windlass, Load Monitoring System,
Hard-facing coating.
