German manufacturer of propulsion systems Schottel has been awarded a contract to supply two EcoPeller SRE 560 and one TransverseThruster STT 3 FP for a multi-purpose support ship (MPSS) for the Portuguese Navy.
The MPSS was developed by Dutch shipbuilding major Damen Shipyards Group based on a new concept and specific requirements of the Portuguese Navy.
The ship, to be named NRP Dom João II, will be capable of deploying unmanned drones and helicopters. In addition to maritime safety and naval support operations, its primary tasks will include oceanic research, search and rescue, and emergency relief.
As disclosed, for the main propulsion, Schottel will deliver two electrically powered EcoPeller type SRE 560 azimuth thrusters with an input power of 2,600 kW each. The L-Drive variant is expected to reduce the installation height of the thrusters. By eliminating the upper gearbox, mechanical losses are further reduced, Schottel noted.
To enhance maneuverability and DP capabilities, the new MPSS will be equipped with TransverseThruster type STT 3 FP (800 kW). With this thruster configuration, the 107-meter-long and 20-meter-wide ship will reach a free sailing speed of 15.5 knots, according to the German company.
In addition, the main propulsion system has been particularly designed and tested for low underwater noise emissions to allow the vessel to meet DNV ‘Silent A’ class noise requirements up to a light survey speed of 10 knots.
The two SRE and the STT will also be equipped with LeaCon, a seal monitoring system certified by DNV, which can protect against seawater contamination caused by lubrication oil.
Separate seals to the seawater and to the gearbox side ensure that both incoming seawater and escaping gear oil are collected in an intermediate chamber. LeaCon is also used to monitor the condition of the seals, so operational wear can be detected at an early stage and unscheduled maintenance avoided, Schottel added.
For its role in oceanic research and monitoring operations, the vessel will be equipped with laboratories and accommodation for scientific staff.
Additionally, to provide naval support, the ship will feature a stern ramp for unmanned underwater vehicles and unmanned surface vehicles, as well as a 94×11-meter flight deck and hangars for unmanned aerial vehicles.
The new MPSS is scheduled for delivery in 2026.