An earlier purchase-leaseback company called Cyclops 1 LLC that dealt with Titan’s predecessor submersible had for some backers returned nearly 90 percent on their initial investment.

A semi-submersible ship would act as a floating base to refuel and rearm the helicopters, allowing them to quickly return to action. In another display of China’s civil-military fusion for its ...

China is planning to send a crewed submersible to explore the polar seabed as part of its growing ambitions in the Arctic Ocean. The vessel has been designed to drop through a hole in the hull of ...