LONDON, Jan 17 (Reuters) - Britain's Rolls-Royce is considering the sale of its commercial marine business, which has been hit by weak demand in offshore oil and gas markets, as part of a restructuring of the company into three core units.
Shares in the company jumped to a 10-week high after it said the loss-making business could be sold. They were trading up almost 6 percent at 902.6 pence at 1420 GMT, topping the FTSE 100 index.
The announcement came as part of a restructuring of the aero-engine maker into civil aerospace, defense and power systems units, with naval marine and nuclear submarines consolidated into defense and civil nuclear into power systems.
Chief Executive Warren East said the latest overhaul would enable the company to respond more quickly to the needs of its customers, both in the wide body civil aviation market and in defense, as well as to reduce costs.
"It will create a Defence operation with greater scale in the market, enabling us to offer our customers a more integrated range of products and services," he said.
"It will also strengthen our ability to innovate in core technologies and enable us to take advantage of future opportunities in areas such as electrification and digitalisation."
Rolls-Royce had responded to the downturn in oil and gas markets since 2015 by reducing the number of sites in its marine business from 27 to 15, and cutting the unit's workforce by 30 percent to 4,200, with the majority based in the Nordic region.
Nonetheless, the marine unit generated a loss of 27 million pounds on sales of 1.1 billion pounds in 2016, with the bulk of the business supplying equipment and vessel design across the oil and gas, merchant and other commercial markets.
The loss widened in Rolls-Royce's first half to 17 million pounds, when it said the market outlook remained challenging.
The unit's performance has been a problem for East as he rebuilt Rolls-Royce after it recorded a record loss in 2016, when it was hit by fines for bribery and declines in some of its older engine programs.
He has cut costs, shortened manufacturing times and stepped up newer engine programs, such as the Trent XWB for the long-range Airbus A350.
East said the business "responded admirably" to the downturn by cutting its cost base, and had also carved out an industry-leading position in ship intelligence and autonomous shipping.
"It is only right that we consider whether its future may be better served under new ownership," he said.
(Editing by Kate Holton)