Page 53: of Maritime Reporter Magazine (February 1997)

Ulstein Design

Facilitates Operations

In Deeper Waters

Solstad has placed a repeat order for Ulstein's new UT740 design, which is distinguished by the large Ulstein Brattvaag winch which can pull 500 tons on the main drum, enabling the vessel to work in waters of 3,280 ft. (1,000 m) or deeper. Following the in- service success of the first UT740 anchor-handling/tug/supply (AHTS) vessel Norrnand Neptun, which was delivered by Ulstein

Verft last March, its owner

Solstad Shipping of Karmoy in southwest Norway has ordered a second vessel of the same design from the Ulstein Group's ship- building division and has taken an option on a third vessel in the series.

The new vessel, contracted for delivery in October 1997 brings the total of Ulstein UT700 series ships built for Solstad Shipping to 13 vessels. It will also be the sixth

Solstad vessel to be built by

Ulstein Verft.

Normand Neptun, with its large

Ulstein Brattvaag winch, can reportedly handle the heaviest anchors, chains and wires in waters of 3,280.8 ft. (1,000 m) depth or deeper.

To ensure this massive winch and the vessel's 222-ton bollard pull can be fully utilized, great care was taken in the develop- ment of the hull lines to ensure adequate buoyancy aft to counter excessive squat when towing mooring lines and hauling anchors. Similarly, the design has been achieved without compro- mising open water performance and seakeeping which were con- sidered of utmost importance for the intended operations of the

UT740 in hostile deeper waters.

As a result of these requirements the depth of the vessel at the stern is 25.5 ft. (7.8 m), about one meter more than earlier large

AHTS designs. the Usteinvik yard to the AP

Moller organization, following a class of six UT745 plj2±fbFnTsuj)^y ships.

An important new addition to the^ workload has been the series of

UT720-type AHTS vessels award- ed to Ulstein Verft by Swire Pacific

Offshore of Singapore. More flexi- ble and powerful than its predeces- sors, the UT720 covers tj^e indus- try's requirement tap^a nWium- sized AHTs of^und 2,0()bsiwt capacitvaod-i^ intended to meet a"" growing demand for substantial liquid cargo intake.

The construction in Norway of the latest generation of vessels for the Coastal Express (Hurtigruta) network is seen as a vindication of the competitiveness of the West

Coast yards anddjaatestic equip-

The allocation of the preceding trio of 11,000-gt fer- ries to German shipbuilder

Volkswerft Stralsund had been a considerable blow to the indige-

New T-Bulbs

Challenge Traditional

Welded Profiles

H » I * -11 g

Recent reports studying the effect of replacing traditional welded profiles with T-Bulbs show significant reductions in paint area, weight, maintenance time, and a higher capacity for corrosion control. Excerpts: "A reduction in paint area of 2,005 m2 in the cargo area is significant.

Sandblasting, painting, and inspection are reduced accordingly." 1) "A large reduction is to be found in the surface area. The reduction is between 580 and 8,600 m2." (2.3% and 13.5%) 2) " good possibility of a reduction in the steel weight. The reduction is between 16 and 295 tonnes." (0.8% and 14%) 2) "The self-draining nature of the T-Bulb, particularly in the upside- down posiHon .will ut^doubiedL^Nfipro^Pcorrosion life." 2) proved, corners on

For more detailed information on these studies and a free T-Bulb design program please call Fundia Profiler on +47 22 58 43 90 or fax on+472218 35 69. fundia

Nordic steel you can rely on

Fundia Profiler AS, Nydalsveien 15, Postbox 4225 - Torshov, N-0401 Oslo, Norway.

Tel: +47 22 58 43 90, Fax: +47 22 18 35 69

An ISO 9001 certified company 1) 'Comparison of built-up T-profiles and Fundia's new T-Bulb profile in a 170,000 Dwt. Bulk

Carrier', Shipping Research Services, August 1996. 2) 'Steel and Area Analysis', Knud

E. Hansen A/S (consulting naval architects and marine engineers), September 1996.

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L February, 1997 53