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Research and Insights | Bunker desk | Technical white paper | September 2026
Bunker Surveys in Africa: The Mediterranean, Atlantic and Indian Ocean Coasts
The group’s continental bunker white paper is now available as a free PDF: 112 pages, 31 figures, three corridors, the 510+ vessel observational review, and planning profiles for the 64+ African ports served by the group and the further locations where attendance is arranged per call.
Download the white paper
Bunker Surveys in Africa: The Mediterranean, Atlantic and Indian Ocean Coasts. Technical white paper, Observater Surveys and Services Group, September 2026.
PDF, 112 pages, 3.7 MB. Opens in any PDF reader. Free to download, print and share in its original form.
What the paper covers
The paper consolidates the group’s regional bunker papers, including the July 2026 East African coast study of 510+ vessels , into one continental reference organized as three corridors. Each corridor section carries a map, a seasonal planning matrix, a transfer-arrangement matrix and a planning profile for every port, with the presence basis stated in every case: our own local surveyors at the port, the group’s active operations in the region, or attendance confirmed in writing before work begins.
Mediterranean and Suez Egypt and Tunisia. Canal-transit deliveries at the Port Said and Suez anchorages, the Mediterranean ECA boundary and the changeover record, Alexandria, Damietta, Ain Sokhna, Safaga, Rades, Bizerte, Sfax and the southern terminals.
Atlantic: Morocco to Angola Twenty-one coastal states from Tanger Med to Namibe with Cabo Verde. The Harmattan and the Gulf of Guinea rains, anchorage waits off Lagos, Tema and Luanda, the ship-to-ship deliveries of Lomé and Cotonou, the river ports of the Niger Delta, Cameroon and the Congo, and the offshore-support fleets from Mauritania to Angola.
Indian Ocean and Cape Port Sudan to Walvis Bay with the Comoros, Madagascar and Mauritius. The monsoons of the Swahili coast, the cyclone season of the Mozambique Channel, the Agulhas current and the Cape winter, and the landlocked hinterlands of the Horn, the Great Lakes and the copperbelt.
What years of bunker attendance around Africa show
The largest avoidable bunker disputes on the African coast rarely begin with a single dramatic event. They develop from several ordinary weaknesses occurring together: measurements taken at different times by different parties, a trim correction not applied on a long double-bottom tank, a density copied from one document into another without a stated basis, a transfer between tanks made during cargo work and not logged, a settling or service tank left out of a declaration, a sample drawn at the wrong point or without seals, or a bunker delivery note signed while the receiving tanks were still settling.
The paper sets out the ten controls that consistently strengthen a bunker case:
early nomination and confirmed access, with the expected bunker or survey start rather than the vessel’s ETA;
a written scope identifying the contractual or operational cut-off time and its location;
a complete tank list, including storage, settling, service, overflow, drain, leakage and relevant sludge tanks;
joint measurement with the vessel and, where access allows, the supplying unit;
correct tank identification and calibration tables, with trim and list corrections applied;
measured temperatures and an identified density source for each grade;
a transfer and consumption log covering the survey window;
representative sampling at the receiving manifold and sealed sample custody where quality is relevant;
reconciliation before documents are signed, with unstable readings repeated rather than accepted;
prompt, neutral reservation of rights when a material difference remains unresolved.
Physical quantitysoundings, ullages,temperatures
Documentary evidencetank tables, BDN,logs, transfers
Timingcontractual time,measurement time
Vessel conditiontrim, list, gauges,access
Calculation assumptionsdensity, VCF,corrections
Independent reconciliationa figure that can be reviewed line by line
The five inputs an independent bunker survey reconciles into one reviewable figure. From Part I of the paper.
What the 510+ vessel observational review found
The paper summarizes the group’s review of more than 510 vessels attended over several years on the East African coast, extended with observations from the Atlantic corridor, the Mozambique Channel, the islands and the Cape sea route. Repeated feeder calls allowed the same vessel to be compared with itself at different points in its maintenance cycle. The recurring findings:
A clean underwater surface generally corresponded with a more favourable relationship between speed, engine demand and fuel consumed; a fouled or rough surface with more power to hold speed or less speed at the same setting. The effect was vessel-specific, not a fleet percentage.
Vessels held for weeks at anchorage in warm water off Lagos, Tema, Luanda, Dar es Salaam, Mombasa, Beira or Toamasina showed a performance step-change on the following passage larger than their normal fouling drift. The paper recommends an underwater inspection before over-consumption is attributed to weather, to measurement or to a counterparty.
Passages compared without recording the monsoon, the Guinea Current, the Agulhas current or the Cape weather were routinely misread as inventory or measurement problems.
Offshore-support vessels from Mauritania to Angola and from Tanzania to Namibia needed a consumption bridge built from operating-mode records, not a daily figure.
Current planned maintenance and orderly machinery spaces went together with accessible sounding points, available calibration tables, traceable transfer records and faster, more repeatable surveys.
The anonymized Djibouti case
During a bunker survey at Djibouti Port, the independent reconciliation identified positive variances between the physically determined quantities and the figures submitted for comparison. The vessel and appointing party remain confidential. The survey converted the difference into documented evidence for reconciliation and offered no conclusion on cause.
VLSFO +35.729 MT
LSMGO +10.872 MT
Combined +46.601 MT
The case illustrates why declared ROB should not substitute for independent measurement when a charter settlement or operating account depends on the result, and it illustrates equally that a variance can run in either direction.
How the paper treats suppliers, traders and barge operators
Observater is appointed by every class of party in the bunker chain, including suppliers, traders and barge operators, one interest per matter. The paper and the group’s survey reports follow the same rules:
No supplier, trader, barge operator, agent, terminal, port or authority is named, rated, ranked or criticized. Port profiles are planning profiles, not assessments.
A difference between two figures is described as a variance to be reconciled. It is never described as a loss, a short delivery, a manipulation or a fraud unless a separate investigation with the appropriate mandate has established that conclusion.
Foam, aeration, stratification, line content or an unstable surface are recorded as measurement conditions to be managed. They are not attributed to intent.
A supplier whose delivery has been surveyed on this basis holds contemporaneous, independent evidence of a properly executed transfer.
A bunker survey is not merely a set of soundings. It is an independent reconciliation of physical quantity, documentary evidence, timing, vessel condition and calculation assumptions at a commercially defined moment. A difference between two figures is a reconciliation item, not a finding of fault.
Inside the paper
Part I. Continental context The three corridors, the fuel-supply context, the regulatory frame including the Mediterranean ECA and the three port State control regimes, what an independent survey proves, the time bridge, the landlocked corridors, and the group’s presence basis country by country.
Part II. The observational study Dataset, method, normalization, the findings above and the consolidated finding matrix.
Part III. Survey types and methodology Bunker quantity, on-hire and off-hire, ROB audit, bunker detective, sampling and mass flow meters; the eight-stage method; measurement uncertainty with calculated charts for sounding error, small tanks, trim, temperature and density; a worked reconciliation; sampling and documentary integrity; the escalation sequence; the Djibouti case.
Part IV. Port by port Thirty-three coastal states on three corridors, each with supply and rules, season and access, recurring planning lessons and measurement observations, and a planning matrix per corridor.
Part V. Underwater condition, maintenance and emissions data The performance triangle, before-and-after review, the anchorage wait as a documented event, planned maintenance as a data control, and the fuel-data chain for DCS, CII, SEEMP and European measures.
Parts VI and VII. Value and appointment What the survey protects for each party, the service matrix, the delivery model, integrity rules, how to appoint, the recommended instruction wording, standard deliverables, the readiness checklist and thirty FAQs.
Find the bunker desk for your port
Every port profiled in the paper is served from a bunker desk on this site, where the nomination, the fee in writing and the attendance confirmation are handled.
On the Mediterranean and Suez corridor, canal-transit and ECA-changeover attendance runs through the desk for bunker surveys in Egypt .
On the Atlantic corridor, the desks are bunker surveys in Morocco , bunker surveyors at Nouakchott , bunker surveys in Senegal , bunker surveyors at Banjul , bunker surveyors at Bissau , bunker surveys in Guinea , bunker surveys in Sierra Leone , bunker surveys in Liberia , bunker surveys in Côte d’Ivoire , bunker surveyors at Tema , bunker surveyors at Takoradi , bunker surveys in Togo , bunker surveys in Benin , bunker surveys in Nigeria with Lagos and Port Harcourt , bunker surveys in Cameroon , bunker surveyors at Malabo , bunker surveyors at Libreville , bunker surveys at Pointe-Noire , bunker surveys in the DRC and bunker surveys in Angola .
On the Indian Ocean and Cape corridor, the desks are bunker surveys in Sudan , bunker surveys in Djibouti , bunker surveyors in Kenya , bunker surveys in Tanzania , bunker surveys in Mozambique , bunker surveyors at Moroni , bunker surveys in Madagascar , bunker surveys in Mauritius , bunker surveyors at Durban , bunker surveyors at Cape Town , bunker surveyors at Richards Bay and surveys at Walvis Bay .
Who the paper is written for
Shipowners and vessel managers protecting the fuel asset and their charter ROB. Charterers settling delivery and redelivery and separating consumption from measurement error. Bunker buyers and traders overseeing a stem. Suppliers and barge operators who want an independent record of a properly executed delivery. P&I Clubs, hull underwriters, adjusters, lawyers and claims handlers who need evidence preserved before positions harden. Technical managers, financiers and port agents who need one reporting standard from the Suez Canal around the Cape to the Strait of Gibraltar. The service practice behind the paper is described on the group’s pages for bunker surveys in Africa and bunker surveys at Mombasa .
Short Deliveries, Off-Hire Bills, Consumption Claims, Rejected Stems: on the African coast, the loss always finds the party without the record.
Owners and managers pay for fuel that was never measured into the tanks and defend consumption claims with noon reports alone. Charterers settle redelivery on a declared ROB taken hours after the contractual moment. Buyers and traders pay a BDN that no one reconciled against the receiving tanks. Suppliers and barge operators answer a short-delivery allegation months later with no independent witness to the completion point. Clubs, underwriters and adjusters receive a file in which the sample seals, the tank list and the time bridge were never recorded. Agents, technical managers and banks inherit the argument.
Whichever seat you hold, send us the vessel name, the port, the expected bunker or survey start, the contractual time and the grades. You receive the surveyor’s name, the attendance time and the fee in writing before work begins, a preliminary figure where sailing time is tight, and a report that any party to the transaction can review line by line.
ops@observater.com WhatsApp the operations desk Download the white paper
One interest per matter: when we take your appointment, we act for your side only, and the findings reach you first.
Bunker Surveys in Africa: The Mediterranean, Atlantic and Indian Ocean Coasts. Copyright 2026 Observater Surveys and Services Group. All rights reserved. The paper is issued for planning and educational purposes and is not legal advice. The paper is licensed under Creative Commons Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0): forward it, post it, link to it and quote from it freely, with attribution to Observater Surveys and Services Group and the file kept in its original form. For any other use, write to ops@observater.com. The PDF carries the group’s mark on every page and its edit and extraction permissions are disabled. This paper consolidates and supersedes the group’s regional bunker papers for the East African coast (July 2026), the Atlantic coast and the Indian Ocean and Cape corridor (September 2026).
Bunker Surveys in Africa, Observater Surveys and Services Group. This web summary is not formatted for printing. Download the white paper as a PDF from observater.com or write to ops@observater.com.