Ingeniat

Or, Why Engineers Should Have What Software Developers Already Take for Granted

The Problem With Regulations

Marine engineering runs on regulations. MARPOL Annex I, IV, VI. SOLAS II-1, II-2. IACS Unified Requirements. Class rules. Flag state interpretations. EU MRV. CII ratings. The list is long and the list changes. A ship designed under this year’s regulations may be non-compliant before it leaves the builder’s yard.

Engineers know this. The problem is that compliance is not a moment — it’s a state. It has to be maintained across every drawing revision, every equipment substitution, every retrofitted scrubber, every re-route of a vent line.

And yet, the tools engineers use to manage this are largely the same ones they used twenty years ago: PDFs, spreadsheets, checklists, and a lot of institutional memory held in the heads of senior reviewers.

The Paper Problem

Every vessel subject to MARPOL Annex V must maintain a Garbage Record Book (GRB) — a chronological log of every piece of garbage generated, discharged, or incinerated at sea. In practice, this means paper forms that crew members fill out by hand, sign with a wet ink signature, and store in a binder that lives somewhere in the bridge.

The problems with this approach are well-known but rarely discussed openly:

• Illegible handwriting makes records difficult to verify during port state control inspections
• Missing signatures or incomplete entries create compliance gaps that can result in fines
• No automated compliance checking — crew don’t know a discharge is illegal until a port inspector tells them
• Hash chain integrity — paper records can be altered retroactively without detection
• No offline capability — many vessels still rely on paper because connectivity at sea is unreliable
• No audit trail — there’s no tamper-evident history of who changed what and when

The IMO’s 2023 guidelines on electronic record books acknowledge that digital solutions are permissible, but the industry has been slow to adopt. dGRB v2 is built to change that.

Getting started

The dGRB app is live at https://dgrb.ingeniat.eu — no signup required.

Demo account (frontend login):

• [email protected] / admin123 — admin role

How we built a production-ready anomaly detection system for marine diesel engines using scikit-learn, physics-based features, and an out-of-distribution detection layer.

Port State Control (PSC) inspections can shut down a vessel for days. A single detention costs between $50,000 and $500,000 in delays, fuel, and reputation damage. Fleet managers spend weeks preparing for inspections using spreadsheets and gut feelings — but nobody actually runs the regulations against the ship’s real state.

What It Does

PSC Readiness is a compliance prediction platform that evaluates every MARPOL, SOLAS, and MLC requirement against a vessel’s actual design data, certificate status, and operational records — before inspectors arrive.

The app takes a vessel’s technical data and runs it through 265+ encoded regulatory rules and it produces:

• PSC Readiness Score — a single number indicating how clean the vessel is
• Predicted Deficiencies — specific items inspectors will flag, ranked by severity
• Risk Level — statistical prediction of detention probability
• Remediation Guidance — exactly what to fix and how

The BWM Suite just got a significant upgrade. Alongside the three core compliance calculators — D-2, Exchange, and Cost — we’re now shipping six new engineering tools designed for the people who actually operate, specify, and certify ballast water management systems.

These aren’t compliance checkers. They won’t tell you pass or fail in isolation. What they will do is answer the harder questions that sit behind the certificate: what’s really happening in your tanks, under your specific conditions, on your specific route?

Getting started

The BWMS Suite is live at https://bwms.ingeniat.eu — no signup required.

Demo account (frontend login):

• [email protected] / admin123 — admin role

What’s new

• TRO Decay & Neutralisation Planner — For operators running electrochlorination or ozone systems. Enter your initial dose, salinity, temperature, and hold time, and the tool maps out exactly when your ballast will drop below the 0.1 mg/L TRO discharge limit — and how much sodium thiosulfate or bisulfite you need if it won’t. Includes a 48-hour decay curve.
• UV Dose Calculator — For UV-based BWMS operators and BWMS specifiers. This one models the actual dose your system will deliver given lamp age, UV transmittance of the water, flow rate, and reactor geometry — then checks it against the D-2 required doses for bacteria, zooplankton, and the hardier algal cysts. It also tells you the maximum flow rate your system can handle while staying compliant.
• Type-Approval Envelope Analyser — The tool that answers “but will my BWMS work in these waters?” Every type-approved BWMS is certified over a specific band of salinity, temperature, and turbidity. This analyser overlays your route’s actual water quality parameters against that certified envelope and tells you exactly where you fall outside it — which matters when flag states ask for technical justification.
• Log-Reduction Uncertainty Propagation — Built for BWMS manufacturers and technical reviewers. Two systems can both be certified at 99.9% log reduction and have wildly different statistical margins. This tool propagates the measurement uncertainty from the type-approval test report through to the discharge concentration, giving you a probability of exceedance and a classification: Robust, Marginal, or High Risk.
• Tank Residual & Sediment Compliance Check — For shipowners on bulk carriers, tankers, or any vessel with tanks that can’t be pumped completely dry. It blends the treated ballast with the unpumpable residual — which still contains organisms at source concentration — and tells you whether the mix stays within D-2 limits at discharge. It also calculates the maximum allowable residual volume for your tank geometry.
• In-Tank Die-Off Estimator — The voyage planning tool. For each organism class — Enterococci, E. coli, zooplankton, phytoplankton, algal cysts — it applies first-order decay kinetics with temperature and salinity shock modifiers to estimate how many organisms survive to discharge. Algal cysts are effectively immortal. Everything else has a half-life. Now you can model it.

A note on the die-off estimator

The die-off estimator carries a prominent disclaimer: it is a planning tool, not a compliance record. No port state control authority in the world accepts natural mortality as a substitute for type-approved treatment or exchange. The tool exists to help you understand whether a longer voyage gives you a practical safety margin, not to game the system.

Managing ballast water compliance doesn’t have to be a spreadsheet nightmare.

The BWM Suite is a dedicated full-stack application for ship operators and maritime compliance teams to manage IMO BWM Convention requirements in one place.

Core Features

• Fleet Manager — Register your vessels with full technical specs (IMO number, GT, DWT, ballast capacity, tank count, BWMS type, installation date, certificate details). All fields editable. IMO numbers link directly to the vessel record for fast editing.

• Ballast Water Record Book — Log every ballast operation inline: date/time (UTC), position, tank ID, operation type (ballasting/deballasting), volume, salinity, source water, and treatment method. Supports CSV import/export for bulk entry. All data tenant-isolated.

• D-2 Calculator — Check discharge compliance against MEPC.200(62) D-2 organism count limits. Select BWMS type (Electrochlorination, UV, Ozone, etc.), source water salinity, discharge volume, and USCG waters flag. Returns pass/fail status, effectiveness percentage, and USCG approval flag.

• Exchange Calculator — Determines required exchange procedure (D-1 or D-2) based on voyage route, ballast volume, total capacity, BWMS status, and distance. Calculates exchange volumes for both 95% and 3× exchange methods.

• Cost Calculator — Estimates BWMS retrofit costs (low/mid/high) across five years including installation, consumables, and servicing. Gives cost per cubic metre and USCG approvability.

• Reports — Download a fleet-wide compliance summary as PDF or XML, or generate an IMO-style Ballast Water Record Book (PDF or XML) for any individual vessel.

Tech Stack

Backend: FastAPI + SQLAlchemy (async) + PostgreSQL, JWT auth via python-jose + passlib, PDF generation with ReportLab. Frontend: React + TypeScript + Vite, Nautilus design system, Axios with token refresh interceptor. 

Getting started

The BWMS Suite is live at https://bwms.ingeniat.eu — no signup required.

Demo account (frontend login):

• [email protected] / admin123 — admin role

Note: The BWM Suite was originally built as a standalone desktop-style application. It has since been reworked into a full client-server architecture with a dedicated FastAPI backend and PostgreSQL database, deployed as a separate service for demo purposes.

The compliance landscape for shipping has never been more complex — and the cost of getting it wrong has never been higher.

Fines under the EU ETS can reach €100 per tonne of CO₂ unaccounted for. FuelEU Maritime penalties stack annually. CII ratings that slip below C don’t just attract scrutiny — they attract commercial consequences: charterers route away, ports deny priority berthing, and insurance premiums climb.

And the regulations keep coming. New rules from the IMO, the EU Commission, and national authorities layer on top of each other every year. Staying current isn’t a one-time project. It’s a permanent operational function.

TideWatch is an automated maritime regulatory alert service that monitors the regulatory environment across nine major compliance regimes — and delivers the information you need, when you need it, where you already work.

Getting started

The deadline browser is live at https://tidewatch.ingeniat.eu — no signup required.

Demo accounts (frontend login):

• [email protected] / curator123 — curator role
• [email protected] / admin123 — admin role
• [email protected] / fleet123 — fleet operator role

Or explore the API directly:

• GET /api/deadlines?regulation=EU_ETS&region=EU&severity=CRITICAL
• POST /api/match with {"vessel_type": "cargo", "gt": 12000, "trading_area": "MEDITERRANEAN", "fuel_type": "VLSFO"}

Questions, corrections, or proposed new deadlines? Use the curator queue or open an issue. Every entry in TideWatch is reviewed by a human.

Nautilus is a fleet management and regulatory compliance platform designed for shipping companies, shipowners, and maritime consultants operating under IMO and EU environmental regulations. It centralizes vessel data, voyage records, and emissions calculations into a single backend, providing accurate, audit-ready compliance documentation for regulatory submissions.

The platform addresses the growing complexity of maritime environmental legislation — a landscape that has shifted dramatically with the introduction of the EU Emissions Trading System (ETS) for shipping in 2024, the IMO’s Carbon Intensity Indicator (CII) rating framework, FuelEU Maritime penalties, and theEnergy Efficiency Existing Ship Index (EEXI) certification requirements.

Try it now on https://nautilus.ingeniat.eu or check the specification here.

(Note: some features cut down on this demo version, contact us for access to a fully featured version)

Getting Started

Log in with the pre-filled credentials:
[email protected] / admin123

What Nautilus Does

Nautilus serves as the system of record for a fleet’s compliance posture. It tracks every vessel in a company’s register, records each voyage with cargo and consumption data, and calculates the resulting emissions, CII ratings, and EU ETS allowances automatically. The backend exposes a REST API consumed by a React frontend, with role-based access for fleet managers, company admins, and regulatory auditors.

Regulatory Calculations

The platform implements four interlocking compliance calculations:

EEXI (Energy Efficiency Existing Ship Index) — A theoretical maximum efficiency threshold calculated from a vessel’s technical design parameters (installed power, TTEW, DWT, design speed). Unlike operational ratings, EEXI is a design certification that vessels must meet through engine power limitations (EPL) or other technical upgrades. Nautilus stores the EEXI certificate reference and tracks compliance status per vessel.

CII (Carbon Intensity Indicator) — An operational rating expressed in grams of CO2 per cargo-carrying capacity per nautical mile (gCO2/t·nm). Vessels are assigned a rating from A (best) through E (worst) based on their annual operational performance. Ratings below D for three consecutive years trigger a corrective action requirement (CAP). Nautilus calculates the CII per voyage leg and aggregates it into a rolling annual rating per vessel.

EU ETS (European Union Emissions Trading System) — Shipping companies operating within EU ports must surrender EU Allowances (EUAs) covering 100% of CO2 emissions from intra-EU voyages and 50% from voyages arriving from or departing to non-EU ports (phased in through 2026). Nautilus tracks total verified emissions per voyage, converts to EUA requirements, and maintains an allowance ledger per company.

FuelEU Maritime — In effect from 2025, this regulation imposes a greenhouse gas (GHG) intensity limit on energy used on board vessels. The limit tightens progressively (‑2% in 2025, reaching ‑80% by 2050). Vessels exceeding the limit face penalties. Nautilus flags non-compliant voyages by comparing fuel energy content against the GHG intensity target.

Walk into most shipping offices and ask how they’re handling EU ETS. You’ll hear the same thing: “We’ll buy what we need in September and move on.” It’s treated like a tax — an irritating compliance cost to settle at the deadline.

That’s not just sub-optimal. Over a three-year phase-in, it’s the most expensive way to do it. And yet, almost nobody is talking about the alternative. Let’s walk through what a disciplined EUA procurement strategy actually looks like — and what it saves.

The phased surrender schedule isn’t just a political concession. It’s a pricing gift.

– 2024 emissions → surrender 40% by September 2025
– 2025 emissions → surrender 70% by September 2026
– 2026 emissions → surrender 100% by September 2027 onwards

That ramp (40/70/100) creates nearly three full years between the first real cash-out and the moment you face the full obligation. You don’t need all your allowances on Day 1. You have time. Time to average in, position on pullbacks, and exploit the single biggest driver of EUA prices that shipping analysts rarely mention: gas market dynamics.

EU ETS and FuelEU Maritime were written with large shipping companies in mind. The monitoring plans, carbon registries, allowance procurement cycles, and annual verification requirements all assume you have people whose full-time job is exactly this. Most small operators don’t. And the regulation offers no simpler version for those who don’t.

Since January 2024, every ship above 5,000 GT calling at EU or EEA ports has been required to purchase and surrender EU Emissions Trading System allowances — real money, real deadlines, real penalties for getting it wrong. The phase-in is steep: 40% coverage in 2024, 70% in 2025, 100% from 2026. For a single tanker or bulk carrier with significant EU trading exposure, that translates to an allowance bill of €100,000 to €500,000 per year — a cost that needs to be procured, tracked, and surrendered by 30 September each year without exception.

FuelEU Maritime, which entered into force in January 2025, adds a parallel framework on top. Where ETS charges you for what you emit, FuelEU sets targets for how clean your fuel needs to be — on a well-to-wake basis that captures the full lifecycle of every tonne of bunker consumed. Miss the GHG intensity target and the penalty is €2,400 per gigajoule of shortfall. The two regimes run independently of each other and require separate monitoring, separate reporting, and separate compliance strategies.

Since 2025 the net has widened further. General cargo ships and offshore vessels above 400 GT came into full MRV monitoring scope under the amended regulation — pulling thousands of smaller operators into a system they had little time to prepare for. For these vessels there are no ETS allowances to buy yet, but the monitoring obligation is real: approved monitoring plans, voyage-level fuel data collection, annual verified emission reports, and the Document of Compliance consequences that follow if any of it is missing.

Management transfers happen every week — vessel sold, technical manager switched mid-season. In most regulatory regimes, it’s a paperwork exercise: update the flag, notify class, move on.

Under EU ETS, it’s something else entirely. A mid-year change doesn’t just shift operational responsibility. It slices the year’s carbon liability in two, creates two separate verified reporting obligations, and starts a clock that, if missed, leaves the new manager non-compliant before the vessel has even completed a full European rotation.

Nobody talks about it until the deadline has already passed. By then, it’s too late.

The EU ETS Directive ties compliance to the “shipping company” — the entity that holds ISM responsibility at the time the emissions are generated. When that entity changes on, say, 15 April, the year’s emissions don’t travel with the ship. They break clean at the handover.

• The previous company is responsible for emissions from 1 January to the handover date.

• The new company picks up liability from the handover date to 31 December.

That means two separate verified emissions reports, two surrender obligations, and two different entities accountable to the administering authority — often in different EU member states.

Most early commentary on FuelEU Maritime focuses on the headline targets: a 2% reduction in greenhouse gas (GHG) intensity from 2025, stepping up every five years toward an 80% reduction by 2050. The conversation tends to centre on which fuels qualify and what well-to-wake compliance means for fuel procurement.

Less attention has been paid to the penalty and flexibility mechanism — the commercial engine underneath the regulation. The €2,400 per tonne VLSFO-equivalent penalty figure is easy to quote. Modelled against the real cost of compliance options and the pooling mechanism, it becomes something quite different: a price ceiling that defines a new internal market for carbon performance. How a shipping company decides between paying that penalty, generating surplus internally, or buying surplus from another operator is a question of commercial optimisation, not just regulatory awareness.

The penalty is a backstop, not a default

The penalty for exceeding a vessel’s applicable GHG intensity target is structured as €2,400 for every tonne of VLSFO-equivalent energy shortfall. In practice, this converts to approximately €58.54 per gigajoule of energy that would need to be displaced to bring the vessel into compliance. Translating that further into emissions-equivalent terms: the penalty works out to an effective cost of several hundred euros per tonne of CO₂ equivalent, depending on the specific fuel baseline — far above the prevailing EU Allowance price and well above the cost of most compliance pathways.

A shipping company operating five bulk carriers that spent all of 2024 trading between West Africa and South America has zero verified EU ETS liability for that year. No emissions to report. No allowances to surrender. The fleet is, by every practical measure, outside the scope of the regulation.

That picture changes the moment one of those vessels sails for an EEA port.

The exposure is not retrospective. It does not arise from what the fleet did last year. It is a forward looking, readiness-based exposure: a set of obligations that crystallise on the day a previously out-of-scope vessel makes its first EEA port call. For operators who pivot to European routes mid-calendar year, the gap between having no EU ETS infrastructure and needing full compliance can be surprisingly narrow — and expensive to bridge under pressure.

The trigger: first EEA port call

EU ETS obligations attach to a shipping company from the moment a vessel within its responsibility arrives at a port under the jurisdiction of an EEA member state. Covering 100% of emissions from intra-EEA voyages and 50% from voyages that begin or end outside the EEA, the regulation leaves little room for a gradual ramp.

For a fleet with no prior connection to the EEA, the immediate requirements triggered by that first call include:

– Holding an approved monitoring plan (MP) specific to the vessel;
– Having a Maritime Operator Holding Account (MOHA) opened in the relevant administering authority;
– Collecting and reporting verified emissions data from the very first EEA-touching voyage.

The commercial decision to fix a cargo to an EU destination is, in effect, a decision to become a regulated entity. The regulatory readiness cannot follow the fixture at a leisurely pace.