Kongsberg Maritime will supply an equipment package for four new offshore construction vessels to be built at Cosco Nantong for Norwegian offshore services provider Sea1 Offshore.

Kongsberg Maritime and Sea1 Offshore will also collaborate on a study to assess emissions reductions achieved with Kongsberg’s equipment.

The equipment package includes K-Pos dynamic positioning systems, integrated control and navigation systems, battery-hybrid DC electrical systems, and main propulsion and thruster units.

The battery-hybrid DC power and propulsion system allows for single-engine usage for most of the vessels’ operational times. The high-capacity shore connection, battery system and energy control system allow for zero-emission operation during port stays and loading procedures, Kongsberg said.

The energy management system incorporates energy flows from the 250-tonne hybrid electric crane, gangways and ROV. It also captures regenerative power and balances the use of batteries with variable-speed engines running on diesel, biodiesel or methanol, the company said

Sea1 Offshore, formerly Siem Offshore, operates offshore vessels in support of oil and gas, renewable energy and research.