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Dry Dock Legislation and Associated Industries
Published in D.J. House, Dry Docking and Shipboard Maintenance, 2015
A designated classed ship must be examined in dry dock at intervals not exceeding 2.5 years. One of these dockings must be in a dry dock to allow inspection of the underwater parts of the vessel. Many shipping companies will dry dock ships at intervals of 30 months for intermediate inspections. An alternative In Water survey (IWS) may be permitted in lieu of one of the two dockings, but it must provide all the information that a docking survey would normally deliver. (Ref. MGN 217)*
Impact on dry dock extension due to deepening of floor slab
Published in J. Parunov, C. Guedes Soares, Trends in the Analysis and Design of Marine Structures, 2019
R. Sundaravadivelu, S. Sakthivel, K.S. Roja
Dry dock is a narrow concrete basin used for construction, maintenance and repair works of ships. Allied structures like dewatering pump house, electrical control room, workshop buildings are needed for operation of dry docks. The existing dry dock was constructed in 1960 s at an island Indian ocean. At present scenario, the operation and maintenance of cargo handling equipment, ship repair facilities have been developed in these islands.
A hybrid risk prioritization method based on generalized TODIM and BWM for Fine-Kinney under interval type-2 fuzzy environment
Published in Human and Ecological Risk Assessment: An International Journal, 2021
Jing Tang, Xinwang Liu, Weizhong Wang
The ballast tank maintenance operation is an important step during the loaded or dry-dock condition of cargo vessels. During the procedure, there are various occupational hazards to people’s safety life and marine environment. Considering the health and safety, a risk prioritization of these hazards should be calculated. According to a real ballast tank maintenance operation of a crude oil tanker introduced by Gul et al. (2017), the potential hazards in the operation are identified by the Designated Person Ashore (DPA), and then estimated by a group of experts. The experts’ judgment about the three parameters P, C and E is the foundation for the hazard risk evaluation.
Examining the performance of retrofit measures in real ship operation using data-driven models
Published in Ship Technology Research, 2022
George Nikolaidis, Nikos Themelis
The obtained data belong to a container ship whose main characteristics are listed in Table 1. For the present study, two separate datasets are examined: the first spans the period from August 2020 to June 2021 (almost 10 months) and the second spans the period from October 2021 to January 2022 (almost four months). Between these two periods hull cleaning, propeller exchange and bulbous bow modification took place during dry-dock. Both sets contain data collected through an automated logging system and meteorological service providers.