The 6-step method to prospect bunker stems before the enquiry lands

Bunker prospecting is the practice of identifying and reaching bunker fuel buyers before a vessel's enquiry reaches a supplier's inbox, rather than waiting to compete once an enquiry has already gone out. It runs as two loops at different speeds: an account loop that builds panel access and credit approval with a commercial manager over weeks, and a stem loop that works a live vessel arrival over days. Most bunker desks run only the second loop, which caps their hit rate to buyers who already know them.

The account loop and the stem loop are the two prospecting motions a bunker supplier or trader runs at different speeds. The account loop targets a commercial manager whose fleet keeps appearing in a supplier's window, with the goal of panel access and credit approval, and it pays off over quarters. The stem loop targets a specific vessel with a known arrival date, with the goal of winning that individual stem, and it pays off in days. Running only the stem loop caps a desk's growth to buyers who already know it.

The fuel buyer on a vessel is most often the commercial manager or, under a time charter, the charterer, rather than the registered owner named on the vessel's registry. The registered owner is the legal owner and is useful for identity and sanctions screening, but is rarely the party paying for fuel. The commercial manager controls the vessel's employment and typically holds the fuel budget when the vessel trades on the owner's account. Under a time charter, the charterer usually pays for the fuel and decides where it is lifted, which is why confirming charter status with the commercial manager is a required step before outreach.

Scrubber probability is an estimate of how likely a vessel is to have a scrubber fitted, based on reading its deadweight tonnage alongside its year built, since scrubber retrofits concentrated in larger tonnage built before the 2020 sulfur limit took effect. A large, pre-2020 vessel carries meaningfully higher scrubber probability and therefore higher probability of burning high sulfur fuel oil than a small or recently built one. Scrubber probability is a filtering signal to prioritize outreach, not a confirmed fact, and it should be confirmed on first contact with the vessel's commercial manager and then logged.

Bunker suppliers need to screen counterparties for sanctions before a stem because suppliers and traders carry heavier exposure than most port service providers: they are the contracting party, they extend credit, and they deliver a physical commodity that becomes evidence in any later dispute. Physical suppliers and traders have themselves been designated in the past for supplying sanctioned tonnage, so the practical question is not whether the vessel itself is sanctioned, but whether anyone in the chain behind it, including the registered owner, commercial manager, ISM manager, and any named charterer, is sanctioned. This information is provided for general guidance only and does not constitute legal advice. Consult a qualified maritime law specialist for compliance decisions.

A panel entry message is an account-loop message sent to a fuel-paying desk asking to be added to that port's enquiry list and to open a credit line, and it is not tied to any single vessel. A stem quote, by contrast, is a stem-loop message sent once a supplier is already on the panel or has a named contact, referencing a specific vessel and arrival date to ask for that individual stem. Sending a stem quote to a desk that has not approved a supplier's credit typically goes nowhere, because enquiries only reach suppliers already on the approved panel.

Bunker traders and brokers prioritize vessel arrivals by scoring each one on three axes: fit, meaning how closely the grade and volume match what the supplier carries; timing, meaning how close the vessel is to its actual stem decision rather than to its arrival date; and panel status, meaning whether the supplier can actually be asked to quote. A vessel that scores well on fit and timing but poorly on panel status is not a stem opportunity at all, it is an account opportunity, and the correct response is a panel entry message rather than a quote.

MagicPort Maritime Intelligence supports bunker prospecting by combining standing vessel alerts filtered by port, vessel type, deadweight, and commercial manager with vessel profiles that show the ownership chain in one place, plus sanctions screening against 300+ watchlists before outreach. This turns the watchlist, filter, and screen steps of the prospecting method into one continuous workflow rather than three separate lookups across different tools.