World map made out of dots to indicate shipping routes

Independent Voyage Analysis

Clear. Defensible. Fair.

RGM Guru helps Charterers and Owners resolve performance disputes before they escalate.

RGM Guru transforms how vessel performance is assessed. By combining forensic engineering, environmental data, and English law, it delivers transparent, probability-based reports that give parties a clear, defensible view of performance.

Key features

Helping you understand what really happened – and why?

Evidence based

Grounded in voyage data; hindcast weather; and clean-hull benchmarks.

Evidence based

Grounded in voyage data; hindcast weather; and clean-hull benchmarks.

Legally robust

Built on English law and LMAA standards

Legally robust

Built on English law and LMAA standards

Transparent & fair

Replaces binary outcome with probability curves.

Transparent & fair

Replaces binary outcome with probability curves.

Commercially relevant

Links technical findings to time and fuel costs.

Commercially relevant

Links technical findings to time and fuel costs.

Ship Performance Monitor dashboard showing voyage map, performance graphs, KPI metrics, and confidence factors on a blue ocean background.

The RGM Dashboard is a planned digital tool that visualises the Reasonable Grounds Model. Suitable for owners, charterers, consultants, and arbitrators, it offers a transparent, interactive overview of vessel performance throughout a voyage – from raw data to legal outcomes.

How it works

A step-by-step forensic method for verifying reported data, identifying reliable performance indicators, and distinguishing between justified and actual outcomes — based on engineering, oceanography, and legal expertise.

Line graph comparing ship-reported wind speed and wave height against hindcast environmental data.

WxVet Analysis: Wind Velocity & Significant Wave Height

We evaluate the accuracy of ship-reported weather by comparing it with hindcast data, identifying exaggerations and determining the environmental correction needed.

WxVet Analysis: Wind Velocity & Significant Wave Height

We evaluate the accuracy of ship-reported weather by comparing it with hindcast data, identifying exaggerations and determining the environmental correction needed.

WxVet Analysis: Wind Velocity & Significant Wave Height

We evaluate the accuracy of ship-reported weather by comparing it with hindcast data, identifying exaggerations and determining the environmental correction needed.

Line graph plotting voyage segments with vessel KPIs—engine speed, speed over ground, through water, fuel correction factor, and slip.

KPI Analysis: Segmenting the Voyage

Refined data is used to segment the voyage and detect trends in operating conditions. KPIs — including engine speed (Veng/RPM), SOG, STW, CF, and Slip — are plotted to identify credible performance points.

KPI Analysis: Segmenting the Voyage

Performance curve chart showing expected clean-hull engine power-speed benchmark compared to actual achieved performance points.

Power Curve Comparison: Clean Hull vs Achieved

Performance points from Step 2 are mapped onto engine-specific power-speed curves. These are then compared with clean hull benchmarks to evaluate if the expected performance was met.

Power Curve Comparison: Clean Hull vs Achieved

Performance points from Step 2 are mapped onto engine-specific power-speed curves. These are then compared with clean hull benchmarks to evaluate if the expected performance was met.

Power Curve Comparison: Clean Hull vs Achieved

Performance points from Step 2 are mapped onto engine-specific power-speed curves. These are then compared with clean hull benchmarks to evaluate if the expected performance was met.

Voyage route map showing daily ship performance data used to compare warranted and observed speed and fuel consumption.

Summary & Report Output

We provide a clear summary of the deviation. Warranted versus observed speed and consumption are tabulated — with any shortfall or excess highlighted — enabling precise calculation of damages or rebuttal of deductions.

Summary & Report Output

Users can quickly assess whether there are valid reasons to expect the vessel to achieve warranted performance, based on observable metrics rather than subjective interpretations.

Large cargo ship being guided by a tugboat at sea during a colorful sunset.

Who is this for?

Owners and charterers to assess claims internally before escalation.
Consultants and legal teams to provide transparent, evidence-based submissions.
Arbitrators to evaluate claims without depending exclusively on expert reports and/or WRC reports.
WRCs (under license) to supplement/complement their own reports.

FAQs

Our Frequently Asked Questions is your go-to resource for quick and comprehensive answers. We’ve gathered the most common inquiries to provide you with instant solutions and helpful insights. Whether you are seeking product details, troubleshooting guidance, or simply want to learn more.

What is the Reasonable Grounds Model (RGM)?

The Reasonable Grounds Model is an evidence-based methodology for assessing ship performance under time charters. It moves beyond outdated “good weather” testing to comprehensively analyse the whole voyage, grounded in verified data and legal standards.

How does RGM Guru work?

Who benefits from using RGM Guru?

Why is RGM better than traditional good weather testing?

What data does RGM Guru use?

Can owners defend claims using RGM Guru?

Is the RGM accepted in legal and arbitration contexts?

Does it replace expert reports?

Can I see an example of an RGM report?

How do I get started with RGM Guru?

Is my data secure and confidential?

Can RGM Guru be used mid-voyage?

Does RGM work with container, tanker, or RoRo vessels?

What if logbooks contain errors?

Sign up to receive updates

The dashboard is currently under advanced development. Its aim is to complement the RGM methodology by providing a robust and intuitive visual platform for comprehending vessel performance disputes.

Sign up to receive updates

The dashboard is currently under advanced development. Its aim is to complement the RGM methodology by providing a robust and intuitive visual platform for comprehending vessel performance disputes.

Sign up to receive updates

The dashboard is currently under advanced development. Its aim is to complement the RGM methodology by providing a robust and intuitive visual platform for comprehending vessel performance disputes.