Article
Version 1
Preserved in Portico This version is not peer-reviewed
Analysis of Drydock Use in Ship Repairing
Version 1
: Received: 20 January 2024 / Approved: 23 January 2024 / Online: 23 January 2024 (08:07:41 CET)
How to cite: Dev, A.K.; Saha, M. Analysis of Drydock Use in Ship Repairing. Preprints 2024, 2024011665. https://doi.org/10.20944/preprints202401.1665.v1 Dev, A.K.; Saha, M. Analysis of Drydock Use in Ship Repairing. Preprints 2024, 2024011665. https://doi.org/10.20944/preprints202401.1665.v1
Abstract
Drydocking a ship is essential to the routine maintenance process during its service/operational life. During the drydocking time, various surveys/inspections are carried out per requirements of the classification society, flag administration, and statutory bodies, particularly the underwater items. For shipyards, optimum utilization of drydock capacity (deadweight) is the most considered factor to optimize the physical performance indicators like drydock occupancy rate, capacity utilization rate, and drydock utilization. However, in real life, even after mobilizing all available resources to achieve the optimum usage rate, the overall physical performance could be higher or lower or not up to the expectation. The average size (deadweight) of ships calling to the drydock is observed to be far below the expected capacity, resulting in under-utilization of installed capacity. However, although the drydock occupancy rate is satisfactory, even 100%. For a substantial amount of time, the drydock has been under-utilized in terms of capacity utilization and drydock utilization rate. Drydocking activities of ships in two (2) drydocks of a shipyard are collected and analyzed. Various physical performance indicators (PPIs) are calculated. They are diagnosed year-wise and presented in tabular and graphical form to demonstrate their behavior over the operating period. Authors have investigated the behavior of the above-mentioned physical performance indicators to justify, technically, the selection of capacity of a drydock. A further attempt has been made to propose some recommendations and guidelines from technical viewpoints for the selection criteria of a drydock capacity based on available resources.
Keywords
drydock; physical performance indicator (PPI); drydock occupancy rate (DOR); capacity utilization rate (CUR); drydock utilization rate (DUR); drydock capacity; deadweight (DWT)
Subject
Engineering, Marine Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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