V-Max tankers STENA VISION and STENA VICTORY
Delivered by Hyundai, the 314,00dwt vessels STENA VISION and STENA VICTORY have one parameter in common with traditional VLCCs and that is the length, 333m. With a breadth of 70m, the vessels are, however, 10m wider than a conventional tanker designed for the same cargo intake.
The aft-end of the vessel is characterised by the large transom stern, twin, widely-spaced funnels and an accommodation deckhouse which houses a complement of 34, plus 6 Suez crew and 4 repair men. Note the huge structure of the bridge wings.
With such a huge beam, it has been possible to select a design draught of 16.76m, allowing navigation on the Delaware River with minimal lightening at the river entrance. This is one of the cornerstones of the Stena Max concept.
Another one is redundancy. V-MAX vessel is equipped with double systems for its propulsion featuring two main engines, two rudders, two propeller shafts. Two separate engines rooms made STENA VISION the first vessel to reach the requirements issued by DNV for its Redundant Propulsion and Separate class notation.
The third is speed. The power output is higher compared to conventionally built tankers
of the corresponding sizes to secure a high degree of operational reliability also in adverse weather conditions. A fourth is operational life. These vessels are designed with the steel strength that will overcome fatigue stress during an operational life of 40 years. Paintwork is also done to a very high standard.
The double-skin hull is divided by a series of transverse and two longitudinal bulkheads, into 15 cargo and 2 slop tanks. Radar-type tank sounding equipment is fitted, and tank washing is effected using Scanjet machines.
The propelling machinery comprises two low-speed engines, each developing 21,490bhp at 105rev/min. A Vulkan clutch in each propulsion line connects with a Schelde gearbox, reducing revolutions to 66rev/min at the FP propeller for better efficiency. Electrical requirements are met by four diesel alternators fitted in the third, centre engine room, and steam is produced in a thermal-oil system to drive three 5,500m3/h cargo pumps.
Three cargo grades can be handled simultaneously with a maximum unloading rate of
16,500m3/h. Length, oa: 333.49m, Length, bp: 320.00m, Breadth, mld: 70m, Depth: 25.60m, Draught design/scantling: 16.76/19.00m, Gross tonnage: 163,761t, Deadweight design/scantling: 266,200/312,600t, Output (MCR); 2 x 21,490bhp x 105rev/min, Service speed (15% sea margin); 16.90 knots, Crew: 34.