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K410 Cable Boat

In February 2008, the Navy ordered two cable boats [Kaapelivene] from Uusikaupungin Työvene Oy. The total value of the cable boat project is EUR 2.5 million, according to the Finnish Defense Forces. The boats allow the Navy to have the independent ability to do small-scale, offshore cable maintenance work. The boats also support the maintenance and upkeep of the national core network and marine surveillance sensors.

The need for cable boats was because, for a long time, the cable ship Putsaari, which was in charge of Rauma-Repola Oy's Rauma shipyard in 1966, was coming to an end. The boats were delivered in 2009 and are located in two different naval bases: Upinniemi in Kirkkonummi and Pansio in Turku.

The boats are used by IT centers. They build, maintain and maintain marine cable networks related to command and messaging systems in our marine areas. The boats also support the maintenance and maintenance of the nationwide core network and marine surveillance sensors. The crew consists of two persons: the master and the chief engineer. In addition, shipboard personnel include IT center staff. The maximum number of personnel in normal use is eight. Boats can also be equipped for short crewing duties in the archipelago. In this case, the maximum permitted number of persons is 45 (crew + passengers). The boats are aluminum-hulled and have no ice rating. The Navigation Area for Ships is Domestic Traffic Area II.

The cable boat was built by Uusikaupungin Yachts Ltd in Uusikaupunki, Southwest Finland. The New Town Work Boat has long experience of over 200 vessels in the design and construction of professional boats and small craft. Uusikaupunki's Work Boat Ltd specializes in customized shipbuilding according to the customer's needs. In connection with other maritime authorities, the Navy has ordered several complete ship classes from Uudenkaupungin työvene Oy. (1. 3 Research background and research method The aim of the study was to study the modifications needed for the cable boat deck hydraulics system: which hydraulics system modifications would achieve a more functional design. The subject matter of the study has become necessary because the years of experience of the staff in the cable work environment have highlighted problems that could not or could not be taken into account at the various stages of the ship's design and construction.

When working on cables, the job description is not just laying and joining the cable at sea, but also constructing so-called anchors from concrete in the shore. For these operations, 1000 kg concrete bags are lifted onto the cable boat deck. Working in the archipelago is always a bit challenging, and so is the cable boat. It is not always possible to drive the ship optimally with the right side to the dock, giving the crane a lifting capacity of 1000 kg. For this reason, the ship's personnel prioritized the crane upgrade.

Bow thruster problems Bow thruster operation as part of deck hydraulics is one of the problems. During cable work, the vessel is dependent on DP, which actively uses propulsion equipment. The bow propeller is also the most powerful device in deck hydraulics with a working pressure of 300 bar and a flow rate of 49 l / min. The DP power boost peaks for the bow thruster cause the same power peaks for other deck hydraulics. In these situations, the flow required by the bow thruster is at its highest, but other devices require less flow than the pump produces. In addition to the inconvenience of work, power peaks pose a safety hazard.

On a cable boat, the dynamic positioning system is used for cable lifting, lowering and jointing, and for divers in the water. All of these require the boat to be precise in positioning or heading.