Maersk Supply Service has placed orders with Rolls-Royce to deliver its new anchor recovery frames (ARF), which are designed to optimise vessel safety and efficiency.
The order is an option exercised by Maersk under a £54m contract awarded to Rolls-Royce in December 2014, for the supply of an extensive package of advanced deck machinery for six, new, high-end, anchor-handling tug supply vessels (AHTS) of Maersk.
The vessels are currently being constructed by Norwegian shipbuilder, Kleven.
Rolls-Royce area sales manager Runar Hjelle said: "The new system is designed to reduce the loads generated when anchors are lifted from sea to deck and lowered from the deck into the sea.
"And when not in use, this innovative recovery frame can be stowed in a deck recess hidden by a mechanically operated hatch cover, providing a much safer working deck environment for ships’ crews. It makes for a more efficient operation."
Compared with the existing anchor-handling frames with a 900 operating angle, the new ARF will be capable of operating at a 1,260 angle to the deck by way of two hydraulic cylinders and a free-rotating roller with a diameter of 1,680mm.
In addition, the 8840mm-wide, 7,990mm-high recovery frame has a nominal towline tension capacity of 200t with a lateral force of 50t. It can be operated in temperatures ranging from -20ºC to 45ºC.
The deck machinery package will include a triple drum main anchor-handling winch with a pull capacity of 500t, two secondary winches, cargo securing winches and other auxiliary winches, as well as a dry bulk cargo system.
Rolls-Royce will also provide rudders and steering gear for Maersk high-end anchor-handlers.
The ships are expected to be delivered between the fourth quarter of 2016 and third quarter of 2017.