Terntank has signed a commercial agreement with Oversea to deploy its Fleet Support Center services across nine advanced tankers, bridging an operational data gap by transforming complex vessel telemetry into actionable fuel-saving strategies. This collaboration leverages digital optimization and maritime expertise to provide continuous, multi-system monitoring, including hull performance, main engine efficiency, and predictive CII forecasting, enabling Terntank to meet stringent decarbonization targets.
Stockholm | May 28, 2026 – In a move highlighting the growing maritime trend of outsourcing heavy data analytics to specialized third-party hubs, Swedish tanker operator Terntank has formalized a commercial agreement with maritime technology provider Oversea. The deal will see Oversea deploy its Fleet Support Center services across nine of Terntank’s highly sophisticated vessels, including its flagship Hybrid-Plus series and two upcoming newbuildings slated for 2027 delivery.
The contract marks a significant milestone for Oversea as its inaugural entry into the liquid bulk tanker segment. It follows a rigorous pilot phase that proved a critical thesis for modern shipowners: having highly instrumented, data-rich vessels is useless without the dedicated analytical bandwidth to act on that data in real time.
Bridge the Operational Data Gap
Modern tankers are essentially floating data factories, generating thousands of data points every second from main engines, auxiliary systems, and flow meters. However, turning this deluge of data into actionable fuel-saving maneuvers or emissions reductions remains a major bottleneck for lean shore-side management teams.
“Our vessels are technically sophisticated with a lot of data available, but we have limited time to collect and analyse the data we receive from the vessels,” acknowledged Claes Möller, CEO of Terntank. “In a sense, Oversea will act as our performance division.”
Under the commercial framework, Oversea’s Fleet Support Center will function as a literal extension of Terntank’s ashore organization. Rather than relying solely on automated software alerts that crews often ignore, Oversea blends digital monitoring with human maritime experts. These analysts continuously monitor the fleet to isolate performance anomalies, translating raw telemetry into structured, monthly directives for both shipboard crews and shore teams.
Multi-System Optimisation: From Wind to Hull Fouling
The scope of the agreement covers four distinct operational pillars where minor efficiency gains translate directly into massive bunker fuel savings and emissions compliance advantages:
- Hull & Propeller Performance: Monitoring hydrodynamic degradation and skin friction to optimize hull cleaning schedules and prevent severe biofouling-induced fuel penalties.
- Main Engine Efficiency: Continuous condition monitoring to ensure the main propulsion systems are operating at optimal specific fuel oil consumption (SFOC) curves.
- Auxiliaries & Electrical Power: Managing auxiliary engine loads and power distribution, critical for hybrid vessels utilizing battery storage.
- Carbon Intensity Indicator (CII) Forecasting: Delivering predictive modeling and improvement metrics to ensure vessels maintain favorable IMO compliance ratings.
Optimizing these parameters is particularly complex given the advanced, heterogeneous nature of Terntank’s fleet. The vessels involved include the cutting-edge Hybrid-Plus series, which utilizes a combination of battery storage, shore power, and dual-fuel engines capable of running on liquefied natural gas (LNG) or liquefied biogas (LBG).
Furthermore, two of the vessels feature wind-assisted propulsion systems (WAPS). Factoring the dynamic variables of wind assistance into traditional main engine and hull performance baselines requires sophisticated hydrodynamic modeling, a capability Terntank is now offloading to Oversea’s hub.
The Oversea Fleet Support Center Workflow
- 1. Data Collection (The Inputs): Continuous vessel telemetry is gathered directly from the fleet, tracking real-time metrics including wind assistance (WAPS), fuel consumption, battery storage states, and engine loads.
- 2. Central Processing: Oversea processes this raw stream using a combination of advanced digital analytics and expert human maritime oversight.
- 3. Targeted Deliverables: The insights are split into specific, actionable pathways for two separate teams:
- Onboard Crews: Receive real-time directives for physical adjustments, such as trim/speed optimization and auxiliary load balancing.
- Shore Management: Receive strategic data for long-term planning, including predictive hull cleaning schedules and proactive CII rating forecasts.
Commercial De-Risking in the Tanker Segment
For Oversea, anchoring itself within Terntank’s operations provides a high-profile proof of concept in the demanding chemical and product tanker space, where strict vetting regimes (such as SIRE 2.0) and tight port turnaround windows leave zero margin for operational inefficiency.
“We are very pleased to have moved from a successful trial into a commercial agreement,” said Jesper Lögdström, CEO of Oversea. “As Oversea’s first engagement within the tanker segment, it is especially rewarding to see how we can deliver clear value and tangible results through close collaboration.”
As the maritime industry faces tightening FuelEU Maritime targets and escalating EU Emissions Trading System (EU ETS) costs, the Terntank-Oversea partnership reflects a broader macroeconomic shift: digital optimization is no longer a corporate sustainability luxury, but a core strategy for commercial survival.
About Oversea
Oversea is a vessel performance management solution and service designed to help shipowners, operators, and managers improve operational efficiency, reduce costs, and lower emissions across their fleets. By combining a powerful digital platform with hands-on support from maritime experts, Oversea transforms complex vessel data into actionable insights that drive better decision-making. The platform enables continuous tracking and optimization of vessel performance, while expert guidance both onboard and ashore ensures that recommendations are effectively implemented, helping maritime organizations achieve greater operational, environmental, and commercial performance.
Source: Oversea