The only specialised marine publication in Oceania that focuses on the maritime industry, from super yachts to small craft to large commercial ships, including coastal shipping, tugs, tow boats, barges, ferries, tourist, sport-fishing craft
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New mast and crow's nest experiment to ascertain the vessel stability Crow's ess cc nest a criteria at the start of the project, as there had been a number of changes made to the vessel (including lengthening of the hull and additional superstructure added) since the last stability book was prepared. Then the preliminary stability analysis for new mast, booms and crow's nest, with topping lift loads which had to be worked out to meet the client's requirements – and all within the required standards and regulations. It was apparent during the analysis and engineering that Abrasive Blasting & Coating Specialists Rudolphs Ltd as d subcontractor to Ship Repair NZ completed all the abrasive blasting and application of Carboline coating systems to FV Carol Linda. Our work scope included the new mast and crows nest, underwater hull and topsides, bulwarks, net deck, skiff ramp, the No.1 fishwell, sections of the engine room, wet deck and pipe alley. A project requiring in excess of 2000 man hours and over 4000L of Carboline paint was applied. Wayne and Caroline Erceg – owners Rudolphs Ltd VIP.S95 S95 95 30 209 Lower Port Rd, Whangarei, Ph: 09 438 8647 Email: info@rudolphs.co.nz Web: www.rudolphs.co.nz Professional Skipper September/October 2013 while the majority of the Pacific tuna fleet have undergone hull lengthening and installation of larger winches and rigging components, very few have had their mast replaced or reinforced to ensure that adequate factors of safety are maintained for the on board lifting systems. Following the collapse of the mast on the Carol Linda, the owners were adamant that all safety standards fac and factors should be applied during the design to ensure t they would not suffer another failure while that in serv service. MID was also involved with updating statutory and safety plans and developing a rigging schedule for the l new lifting arrangements. Th led to the construction design of the new This mast mast, booms, goosenecks, deck foundations and topp topping block attachments, ensuring compliance wit with all required factors of safety and limiting str stress criteria. The design included further stress simulation al along with a secondary inclining experiment to capture the weight changes from the new m mast and booms and numerous other changes undertaken during the refit in the yard. From this information an updated stability book was prepared to the United States Coast Guard Cod Code of Federal regulations, including updated tank calibrations and stability instructions for the master to ensure adequate stability during fishing operations. On top of this process was the construction design of a replacement aluminum crow's nest to sit atop the main mast and meet the client's criteria for available space, clear vision, access to major lifting components for regular maintenance and to support navigation lights, radars and antennae. The spotter has a huge responsibility on these boats because it is from his skills, knowledge and keen eyes that the next successful freight will come The electrical contract was given to Marine & Industrial Electrics Ltd who replaced more than 2,500 metres of cable. All cabling associated with mast mounted equipment had to be replaced, meaning extensive runs of cable for services such as radio and communications, navigation equipment, alarm systems, navigation lighting and hydraulic systems. Deck lighting is important on these types of vessels and Marine & Industrial Electrics fitted high output LED floodlighting to the boom, mast and working deck areas. Part of the electrical contract included refurbishing the existing PA system. A general clean up of the hotch-potch of aerials and antennae from around the ship to a new aerial arch located aft of the wheelhouse. Icon VHF and UHF radios were selected as part of the refit or replacement of radios and communication gear in the new crow's nest, along with the huge high-powered binoculars used to spot birds on the horizon. Three new Furuno radars consisting of two S-band and one X-band with additional remote screens in both the captain's cabin and crow's nest were installed. As part of the package, a new Furuno AD100 Gyro converter was added to stabilize accuracy of all the directional information, an important feature when tuna fishing. These radars are so sensitive and accurate that they can pick up a loan frigate bird working from several www.skipper.co.nz