HE RMK Marine shipyard in Turkey is currently involved in a most interesting project to build a small 4200dwt (5200m3
)
Azipull thrusters for new coastal tanker T
coastal product vessel for Norwegian owner Bergen Tankers. This has been designed by Rolls-Royce member NVC-Design (Nordvestconsult), based in Ålesund, and the most innovative feature is the specification of twin Ulstein Aquamaster Azipull azimuthing propellers (another new larger tanker recently built in Turkey, the 15,000dwt Puli, also has azimuthing main propellers but these were conventional types from the Ulstein stable and of a different design, as discussed in The Naval Architect June 2005, page 11). A tailor-made hull, just 92m long, was developed to accommodate the diesel- mechanical propulsion plant with its forward- facing propellers, and the thrusters plant has enabled an increase in cargo volume of between 5% and 7% to be achieved by moving the engineroom bulkhead further aft. The new ship will operate into small Norwegian ports, often with difficult access, thus the azimuthing propellers and a 500kW tunnel bow thruster will aid efficient manoeuvring.
In developing the hullform, NVC-Design had to ensure that the tanker would have good course-keeping ability - often a problem for
ships of this type. The Azipulls will however help greatly, since their hydrodynamically optimised underwater units provide substantial rudder area. Even so, a major
programme of computational design and model testing was undertaken to ensure that course stability is well in excess of IMO's zig- zag test requirements.
Last month, we illustrated (page 24) two of three new 100,800dwt ice-strengthened tankers (Pavel Chernyshand Captain Kostchev), built by Hyundai Heavy Industries for Primorsk Shipping. Here,we show the newly developed Hyundai-Transas intelligent bridge system (HTiBS), which is installed on this trio; it is seen at the Neva 2005 exhibition in St Petersburg. This interesting advanced package is expected to become the first navigation concept to be accepted by Det Norske Veritas to meet its NAUT-AW class C notation. The third ship in the series, Viktor Titov, is presented in Significant Ships of 2005, which is published this month.
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