Ullswater

Supporting offshore and subsea operations.

‍

Delivered in 2010 for Hallin Marine, Ullswater is a 78-metre DP2 Subsea Operations Vessel designed to support a wide range of offshore activities including diving support, subsea construction, crane lifting, and remotely operated vehicle (ROV) operations.

The vessel is equipped with a 15-person saturation diving system and a 50-tonne offshore crane, enabling complex subsea intervention and construction work in demanding offshore environments.

To support onboard environmental compliance and operational efficiency, the vessel was fitted with a Hamworthy wastewater treatment system designed for reliable long-term marine operation.

‍

Automated wastewater treatment for offshore vessels.

‍

Ullswater was equipped with a Hamworthy Super Trident ST10C Sewage Treatment Plant for the treatment of black and grey wastewater streams onboard.

Certified to meet IMO MEPC 159(55) requirements, the system is designed to provide reliable wastewater treatment while supporting uninterrupted offshore operations.

Compatible with both conventional gravity-fed and vacuum collection systems, the fully automated design allows unattended operation, helping reduce maintenance requirements and long-term operational costs.

‍

Built for demanding offshore environments.

‍

Offshore support vessels require onboard systems capable of operating reliably throughout extended deployments and complex mission profiles.

The Super Trident ST10C supports:

• Automated wastewater treatment operation.
• Reliable treatment of black and grey water streams.
• Reduced crew workload.
• Lower maintenance requirements.
• Compatibility with multiple collection system configurations.
• Compliance with recognised marine wastewater standards.

‍

Results:

‍

• IMO MEPC 159(55) certified wastewater treatment.
• Automated operation with minimal crew intervention.
• Treatment of both black and grey wastewater streams.
• Suitable for gravity-fed and vacuum collection systems.
• Reduced maintenance requirements.
• Reliable operation in offshore vessel environments.