Fuel costs are increasing faster than at any time in the past 50 years. For commercial and government fleet operators, the financial and operational pressure is mounting. Volatile energy markets, heightened compliance requirements, and rising expectations around emissions performance are all occurring simultaneously. Fuel is no longer just a line item in the budget; it is a strategic tool that directly affects service delivery, fleet availability, and long-term sustainability.
This pressure drives a need for change and presents a significant opportunity. Operators who can accurately measure, compare, and optimise fuel consumption across their fleets are much better positioned to control costs, improve efficiency, and demonstrate responsible management.
Because fuel savings aren’t found, they’re measured.
From Individual Vessels to Total Fleet Efficiency
Every fleet’s fuel performance is shaped by the behaviour of individual vessels operating day after day. On Watch enables fleet managers to understand fuel efficiency at the most granular level, while also scaling those insights across vessels of the same design and different vessel classes.
This fleet-wide perspective is essential. Two vessels of the same class, operating the same route, should perform similarly. When they don’t, data reveals why. Over time, these insights help fleet managers enhance the entire fleet's performance by reducing variability and reinforcing best practices.
On Watch transforms fuel management from isolated vessel analysis into a coherent, measurable fleet‑level strategy.
Establishing the Baseline: Measuring What Matters
Smarter fuel management starts with consistent measurement of the fundamentals. On Watch captures data from onboard sensors to track key indicators such as:
These measures establish an objective baseline for each vessel. When applied to identical vessels, this data allows for comparison of comparable performance and helps identify where fuel is used efficiently and where it is not.
At the fleet level, this provides a clear picture of the main factors driving fuel costs and helps distinguish between unavoidable fuel use and operational inefficiency.
Understanding Variation Across Identical Vessels
One of the most powerful applications of data is identifying performance variation between vessels of the same design.
On Watch allows fleet managers to compare fuel consumption across sister vessels operating on similar routes and under similar conditions. Differences that were once attributed to normal variation now become measurable and explainable. Factors such as trim settings, throttle behaviour, maintenance timing, or hull condition can often be identified as contributors to increased fuel burn.
By understanding and correcting these variations, operators can improve overall fleet performance by promoting individual excellence.
Scaling Insight Across Vessel Classes
Many fleets operate multiple vessel classes, each with distinct roles, operating ranges, and efficiency traits. On Watch offers fuel analysis not only within vessel types but also between them, enabling fleet managers to see how various assets contribute to overall fuel costs.
This enables smarter decisions around:
Over time, this insight can also inform future procurement, refit, and fleet renewal strategies, grounded in real operational performance rather than just theoretical specifications.
An example of On Watch's fleet fuel economy reporting, comparing daily fuel consumption across 7 vessels.
Moving Beyond Raw Numbers: Why Fuel Is Used
Fuel efficiency depends on much more than engine output alone. On Watch develops a deeper understanding by analysing fuel consumption alongside operational and environmental factors that impact vessel performance.
Trim and Setup
Incorrect trim increases drag and fuel consumption. By correlating trim data with fuel burn and speed, operators can define optimal trim profiles for different operating conditions, then apply them consistently across similar vessels.
Hull Condition and Maintenance
Hull fouling causes a steady, measurable increase in fuel burn. On Watch helps managers to identify this gradual decline, compare hull performance across similar vessels, and objectively confirm maintenance and cleaning schedules based on fuel-efficiency results.
Route Efficiency
Operators can often experience variation in route-level efficiency. Once again, On Watch data helps explain why and identify potential improvements.
Driving Style and Throttle Management
Subtle variations in throttle use have cumulative impacts. By comparing fuel consumption across crews and vessels, fleet managers can identify efficient operating patterns and promote consistent, data-backed driving practices across the fleet.
Adding Context: Load, Tides, and Weather
Fuel data without context can be misleading. Passenger loads, payload, tides, wind, and sea state all influence consumption.
The depth of On Watch data allows fuel and other vessel data to be statistically adjusted, normalising the data and ensuring that efficiency comparisons are fair and meaningful. For example, increased fuel burn on a fully loaded vessel running against the tide is expected, but persistent deviations under similar conditions are not.
This contextual analysis helps fleet managers target improvement efforts on areas that provide the greatest return.
Turning Insights into Fleet‑Wide Action
Insight only becomes valuable when it drives action.
On Watch helps operators translate measurements into deliberate changes across maintenance, vessel deployment, and daily operations. These may include:
Crucially, On Watch supports continuous validation. Changes can be tracked, verified, and refined, ensuring improvements are maintained across the fleet rather than depending on one-off initiatives.
Integrating Fuel Intelligence into Fleet Management Systems
Fleet-level efficiency improves most quickly when insights are integrated into operational workflows.
On Watch reports and recommendations can be integrated with fleet management platforms such as Helm Connect, enabling fuel performance insights to inform maintenance planning, vessel logs, reporting, and oversight. This integration ensures fuel optimisation is part of everyday fleet management, not a separate task.
Specialist partners like Tiller Technical support operators in structuring these integrations, ensuring systems collaborate effectively and insights translate into practical operational actions across the fleet.
Beyond Fuel: Total Cost and Emissions Reduction
Fuel optimisation delivers benefits well beyond direct cost savings.
By improving efficiency fleet‑wide, operators also gain:
Every litre of fuel saved also directly reduces CO₂ emissions. By focusing on operational efficiency rather than capital-intensive change, On Watch enables meaningful emissions cuts across existing fleets, supporting sustainability goals with measurable results.
A Smarter, Measurable Approach to Fleet Efficiency
In a high-pressure operating environment, averages are no longer sufficient. Fleet managers require clear, comparable data across vessels, classes, and routes - and the capacity to act on it.
On Watch provides the foundation for smarter fuel management by turning individual vessel data into fleet‑wide efficiency, cost control, and emissions reduction.
Because the most meaningful fuel savings and the greatest gains in fleet efficiency aren’t assumed. They’re measured with On Watch.