VOS Start Subsea Support Walk-to-Work Vessel, Netherlands
VOS Start is a new subsea-support walk-to-work (W2W) vessel being built by Fujian Southeast Shipbuilding. It is the first of two identical vessels ordered by Vroon to meet the increased demand for offshore personnel-transfer solutions.
A keel-laying ceremony for the vessel took place in November 2015, and delivery is scheduled for 2016.
VOS Start design details and features
The vessel is based on a new design developed by Khiam Chuan Marine (KCM). The unique vessel concept will offer deck space for the installation of a walk-to-work system, as well as a range of additional services.
The W2W vessel will have an overall length of 80m, moulded breadth of 18.4m and maximum draught of 5.8m. The deadweight at maximum draught will be 2,000t. The gross and net tonnages of the ship will be 4,700t and 1,410t respectively.
Deck equipment and systems
VOS Start will offer a total deck area of 450m², with 260m² of open deck and 190m² of sheltered deck space. The vessel will be fitted with a deck crane featuring a lifting capacity of 3t at 10m outreach, six skidding systems and two electro-hydraulic capstans.
Additional equipment will include a W2W AHC gangway, crane jib extension and equipment for gas / oil delivery from segregated tanks.
Navigation and communication systems aboard VOS Start
The positioning reference systems will encompass two navigation radars, including a Furuno FAR-2117-D X-band radar and a FAR-2137S-D S-band radar, and two GP-150 GPS devices.
The vessel will be equipped with a Furuno FE-700 echo sounder, an Anschutz Pilot Star D auto pilot, three Anschutz gyro compasses, a standard 22 magnetic compass, an electronic chart display and information system, and a Kongsberg DPS-2 dynamic positioning system.
The communications will be supported by a Furuno model RC-1800T high-frequency radio, a Furuno FM-8800S very high-frequency radio, three McMurdo model R2 GMDSS two-way portable very high-frequency radios.
The vessel will also feature a McMurdi SMARTFINDE5 satellite emergency position indicating radio beacon (EPIRB), a Furuno FA-150 automatic identification system, and a McMurdo S4 search-and-rescue transponder (SART).
VOS Start will have a fuel tank capacity of 940m³. It will be capable of storing 1,500m³ of drill water, 340m³ of recovered oil, 710m³ of fresh water, 15m³ of dirty oil and 15m³ of lube oil, as well as 25m³ of foam and 25m³ of detergent.
VOS Start safety features
Two lifeboats with a total capacity to rescue 80 persons will be available onboard. The vessel will also accommodate two life rafts capable of carrying 15 personnel each.
Two fast rescue crafts onboard the vessel will be launched by two davits. Each rescue craft can carry 15 personnel. Two scrambling nets, one on each side of the rescue zone, will be installed for additional safety.
Classified under ABS FiFi Class 1, the external fire-fighting system will include two monitors with a capacity of 1,200m³ per hour each. A fixed water spraying system with two tanks, one for foam and one for detergent, will also be installed on the vessel.
The accommodation facilities on VOS Start are designed to comply with Maritime Labor Convention 2006 standards.
The vessel will offer accommodation for 87 personnel, with 27 single-bed cabins for the crew, and 22 single-bed and 19 double-bed cabins for the charterer.
It will also provide two recreational rooms, a gymnasium, a cinema and four offices, including one sky client office.
The propulsion system of the vessel will integrate two 2,400kW MAK main engines and two controllable-pitch propellers (CPPs). The vessel will also be equipped with two 12t, super-silence, 800kW electric tunnel thrusters and a 13t, 700kW retractable bow thruster.
The main and auxiliary power systems will include two 550kW and a 910kW diesel-driven main generators, a 550kW client generator, a 130kW emergency generator, and two 1,230kW M/E-driven shaft generators.
The vessel will consume 18.4Mt of fuel a day when sailing at a speed of 13kt, and 9Mt when sailing at 12kt. It will burn 7Mt of fuel in dynamic positioning mode.