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Frequently Asked Questions

A. Questions on the PRL methodology

What is the PRL?

‘Port Readiness Level for Marine Fuels’ (PRL-MF) is a self-assessment framework (and associated tool) to accelerate shipping’s decarbonisation by making low and zero carbon fuels available at ports. The PRL was (loosely) based on the Technology Readiness Levels created by NASA, and outlines the nine stages that a port must go through before it’s bunker operators can bunker vessels using new fuels. 

The first three levels concern the research phase, the next three levels address the development phase and the last three levels speak to the deployment phase:

  • Research Phase (PRL-MFs 1-3): The goal of the research phase is to determine the relevancy of the fuel for the port and its stakeholders. This phase will help to identify information gaps, determine pros and cons, and ascertain the interest of port stakeholders. 
  • Development Phase (PRL-MFs 4-6): The goal of the development phase is to make strategic decisions about implementation, create a guiding framework based on assessments and testing, and run a pilot test for the target fuel. 
  • Deployment Phase (PRL-MFs 7-9): This phase includes scaling-up operations, beginning with a project-based approach and growing into a systems approach that will create a regular port operation. 

This framework is designed to be fuel agnostic and will create an ‘apples-to-apples’ baseline for global communication about the options available for vessels using low and zero carbon fuels. The PRL can also be used for port calls by vessels using low carbon fuels and will be applied to marine fuels as cargo in the future. 

The PRL is available in two forms (a downloadable PDF and an online tool) and consists of a set of guidelines that ports can follow. Given variations in how individual ports work around the world, not all of the guidelines will be relevant to every organisation. This is why we have a single “aim” for each level, which makes it easier for an individual port to recognise when they have achieved a level.

The tool is a living document that will be regularly updated to reflect user feedback.

 

Why should I generate a PRL?

The PRL is a valuable asset for ports, shipping and wider maritime stakeholders to bridge the gaps between current fuels/operations and the low or zero carbon marine fuels/operations of the future. The PRL will help ports and their community stakeholders to assess their current ability to supply future fuels and identify any gaps that would benefit from support (including finance, policy, infrastructure, training etc). Furthermore, gathering the data to generate a PRL will help a port identify which stakeholders should be a part of this process and provide the opportunity to generate buy-in. Examples of these stakeholders include governments, first responders, private sector financiers and more. 

Most importantly, generating a PRL will allow clear and effective communication about a port’s current status and its ambitions for the future, which can help to prevent stranded assets by de-risking investments by all stakeholders. It creates a one stop portal for clear communication about which fuels will be available along a future timeline.

The PRL can be used to

  • Initiate dialogue within the port community and with external stakeholders about the transition to future fuels.
  • Increase fuel availability, develop safety standards and port infrastructure to support future fuels.
  • Allocate resources and strategies 
  • Ensure appropriate governance 
  • Communicate with stakeholders about the port's readiness for alternative fuels.

By using the PRL, ports can demonstrate their commitment to sustainability and attract new business from shipping lines and bunker suppliers. Additionally, stakeholders can make informed decisions when investing in fuel production, ships, equipment, planning, routes, green corridors, and more.

 

B. Questions on governance of this digital tool

Who designed the PRL?

The PRL was created by the Sustainable marine fuels working group of the World Port Climate Action Programme (WPCAP) in conjunction with the Clean Marine Fuels (CMF) working group of the International association of Ports and Harbors (IAPH). Its online version is developed in partnership with the Pacific Northwest National Laboratory and co-funded by the U.S. Department of Energy and U.S. Department of State.

Many organisations contributed to testing this tool including the International Chamber of Shipping, the Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping, the Lloyds Register Marine Decarbonisation Hub, UNCTAD, Intent Communications and more.

 

Who owns this tool?

This tool is owned and managed by the IAPH.

 

Do I have to pay for this tool?

The PDF of the PRL is free to download and use. As you can imagine, there are costs associated with hosting and running the digital version of the tool, but we are glad to say that this is also currently free to use. Future development and associated costs may alter the current policy. 

 

Who owns the data that I have entered?

The data for the PRL entered by each port is owned by the port itself. The port users have full control over the use of their data and may choose to make part of it public or keep it confidential. 

 

Are the published levels considered certified?

The PRL is a self-assessment tool and there is no official certification available at this time.  

 

Who is able to see the results that I have not published?

Your data within the PRL application is (strictly) only visible to you unless you decide to share it with others.

 

C. Questions on how this digital tool works

Why does my output not show as 100% despite the fact that I have completed the level?

The output function reflects how much information has been entered into the digital PRL tool rather than your port’s status. If you have indicated that some of the guidelines are not applicable to your port (which can legitimately be the case), the output will not show as 100% despite you being able to self-assess your port as being past that level.

 

I have a question on the tool or I wish to provide feedback. Who can I contact?

You can use the contact us form or provide feedback using the links on this website to communicate with us. We appreciate your feedback so please do share as much information with us as possible.

 

D. Expert questions on the PRL methodology

Should all ports aim to reach PRL 9?
Achieving level 9 of the PRL is not necessary as this indicates a spot market where the improvements are incremental and often just financial rather than moving up to a new stage. The port should only aim to achieve the level that makes safety, commercial and strategic sense for them. Most ports should be able to achieve at least level 3 which will lead to a decision to pursue the fuel or not. Some ports may remain at the project level (PRL 7) for individual fuels.

 

E. Fuel Type Guidance

What is meant by “Fuel type”?

When starting a new assessment several options are possible for detailing the Target fuel that is assessed, a “fuel type”, “stored form” and “delivery method”, these are optional.

However, regarding the “fuel type” the following needs to be taken into consideration. If a fuel is available in the port, it is often offered from different sources, grey, blue, bio or green. This is important information for the users of these fuels but makes it difficult for a port to indicate what type of fuel is available. Often, the availability and use of a fuel starts with the grey variant. And depending on availability and price, that will shift to the blue, bio or green variants. Of course, the ambition is to make that process as fast as possible. How can we indicate the status of that process in the PRL tool?

The reason for inclusion in the PRL-tool is in order to demonstrate that fuels with a certain positive carbon intensity (bio, blue and green) are available for bunkering in the port.

How do I use "Fuel Type"?

It is a choice to indicate “Fuel type” when carrying out the assessment and not mandatory.

In the PRL methodology the difference between the different sources of the fuel will be expressed only in a few assessment items of the questionnaire eg in the domain market such as influence on fuel availability and its strategies/measures though also for communication (Governance),

In the application the possibility of copying assessments is included. It may therefore be a choice to do a general assessment, copy it and make it specific to a particular “Fuel type”.

By copying the assessment list and only changing relevant assessment items it is easy to make an overview for the different sourced fuel types .

In the PRL methodology the difference between the different sources of the fuel will be expressed only in a few assessment items of the questionnaire, By copying the assessment list and only changing relevant assessment items it is easy to make an overview for the different sourced fuel types.

How should I Interpret the different colours with “Fuel type”?

Note: Information on definitions for Grey, Blue, Green, and Bio are PRL-tool definitions and may be different from other sources.

  • Grey energy: Energy produced from fossil fuels which may not significantly reduce well-to-wake carbon dioxide emissions
  • Blue fuels: Fuels based on hydrogen made from fossil energy sources with carbon capture and storage (>90% capture rate) across the production process e.g. blue NH3, blue H2.
  • Green (E-fuels or RFNBOs) fuels: E-fuels or electrofuels are based on hydrogen produced by electrolysis primarily using renewable and nuclear electricity (e.g., e-H2, e-NH3, e-methane, e-methanol). These are sometimes referred to as renewable fuels of non-biological origin (RFNBO), green, or synthetic fuels. The carbon content of these fuels can be obtained from either biogenic or captured carbon sources.
  • Bio-fuels:  Second/third generation biofuels made from advanced biomass feedstocks (e.g. waste,  algae) that do not compete with food/feed for land use.  The sustainable feedstock are waste streams of a biogenic origin such as manure, agricultural waste and food waste, which can be converted into bio-methane and further upgraded to bio-methanol.

What Sources Were used to Define "Fuel Types"?

Review of Existing Practices on Marine Fuel Sustainability Aspects/ Certification and Thirdparty Verification Issues Final Report; Report for: International Maritime Organization (IMO); Future Fuels and Technology Project; 25/01/2025

Fuel Pathway Maturity Map; Maersk Mc-Kinney Moller Center