Separate maritime pathway

Vessel performance requires vessel-specific evidence.

Maritime CAP is intentionally separate from road-fleet accounting. A shipping company can screen road vehicles, yard tractors, cranes and mobile port machinery through Road Fleet CAP, while vessels enter a separate methodology and performance review.

Non-combination control: do not combine vessel accounting with road-vehicle accounting. LVEP Engine Oil is not represented as an already eligible maritime measure. A methodology confirmation is required before maritime project development.

Asset group 1

Port and land-side equipment

Road vehicles, yard tractors, cranes and mobile port machinery can be screened in the relevant road-fleet/mobile-machinery pathway, provided the intervention, service, monitoring and other eligibility conditions are met.

Asset group 2

Seagoing and inland-water vessels

Vessels require the Maritime CAP review below. Baseline, operating covariates, fuel data and regulatory interactions are materially different and cannot be treated as a road-fleet extension.

Possible pathway - subject to confirmation

Methodology applicability matrix.

The Gold Standard methodology concerning retrofit energy-efficiency measures in shipping may be considered as a reference pathway. CAP must first confirm whether the intervention and project design are eligible; this site does not assert eligibility.

Applicability item	Maritime CAP evidence required	Decision / control
Intervention eligibility	Document LVEP specification, engine applicability, performance mechanism, OEM acceptance and retrofit classification.	Do not presume eligibility; obtain methodology confirmation.
Vessel class	Identify vessel type, main and auxiliary engines, propulsion, service profile and ownership/charter arrangement.	Define a consistent eligible population.
Baseline and project periods	Historic and project operation must reflect representative comparable service.	Define periods, exclusions and change controls.
Fuel measurement	Fuel type/blend, bunker records, flow meters where available, reconciliation and allocation between engines.	Document precision, source and audit trail.
Speed, distance, draft / payload	Voyage distance, speed, loading condition, draft, cargo/payload or service proxy.	Use in stratification or performance model.
Weather and sea state	Relevant weather, current, sea-state and route characteristics.	Adjust or model material operating variation.
Auxiliary-engine consumption	Separate auxiliary use, hotel load and port operations from propulsion fuel where required.	Avoid misattribution of fuel changes.
Maintenance condition	Hull, propeller, engine, dry-dock and other condition changes.	Document and control co-interventions.
Regression / performance modelling	Appropriate covariates, model diagnostics, uncertainty and conservative treatment.	Specialist review required.
Additionality / surplus	Investment/barrier evidence, common practice, applicable laws and policies.	Confirm against selected program requirements.
IMO, EU ETS and FuelEU Maritime	Identify applicable vessel, voyage, flag, port-call and regulatory obligations.	Assess compliance interaction and double-counting risk.
Validation / verification	Project documentation, monitoring evidence, model, QA/QC and claims.	Use required independent process if pathway proceeds.

Maritime monitoring plan

Measure the service, not just the fuel.

Voyage and service records

Vessel ID, voyage, route, nautical miles, speed, date/time, port calls, draft/payload, loading condition and service type.

Energy records

Bunker fuel by type/blend, main-engine and auxiliary consumption, fuel measurement method, tank reconciliation and engine operating hours.

Condition records

Weather/sea state, maintenance, hull/propeller work, engine interventions, dry docking and other changes that could affect performance.

Primary measures

L / nautical mile

Use L/tonne-nautical-mile where reliable payload data are relevant to delivered service.

Modelling caution

Covariates matter

Regression or vessel-performance modelling must be justified, transparent and reviewed; no simple fleet-average shortcut is assumed.

Carbon-market controls

Regulatory interactions are part of maritime eligibility.

IMO requirements and, where applicable, EU ETS and FuelEU Maritime must be assessed alongside national rules, contract rights, compliance obligations and potential double-counting or double-claiming risk.

Identify the party with authority over fuel, vessel operation and environmental attributes.
Assess whether a regulatory obligation already requires or accounts for the outcome.
Record host-country and international-transfer status where applicable.
Keep vessel data, claims and potential credits traceable at every state change.

Formal decision gate

Methodology confirmation required.

Maritime CAP cannot advance from concept/pilot evidence to carbon-credit development until a competent methodology review confirms intervention applicability, baseline approach, monitoring, additionality, regulatory surplus, validation/verification route and treatment of double-counting risk.

Current representation: No eligibility, registration, authorization, verification or issuance is claimed.

Request a maritime feasibility discussion