© 2026 Observater Surveys and Services Group. All rights reserved.
Observater Surveys and Services Group · Onne Port · Offshore Support · Rivers State
Our marine surveyors in Onne attend vessels 24/7 at the hub of Nigeria’s offshore support fleet: vessel condition surveys, on-hire and off-hire surveys for OSV and supply vessel charters, suitability inspections for project and offshore work, hull and machinery damage surveys, P&I attendance, and bunker surveys, with scope confirmed in writing before work begins.
The vessel is the most expensive thing in every maritime dispute, and the party without an independent marine surveyor argues about it from the other side’s report. Shipowners, managers, charterers, H&M underwriters, and P&I clubs all instruct the same surveyors, under one rule: one interest per matter.
Get a Marine Surveyor Moving Email the InstructionThe OSV charter turns on condition. Offshore support vessels change charters constantly, and every change is a condition argument waiting to happen. On/off hire surveys at Onne are what keep the argument short.
The vessel is nominated before it is looked at. A vessel fixed for a project lift or an offshore run on paper alone brings its surprises to the job. Suitability inspection against the intended work happens before the fixture commits, or the schedule pays.
The casualty evidence sails away. After contact damage or machinery failure on an offshore run, the vessel leaves and the evidence leaves with it. The first hours on board decide the file.
The fuel was paid for unmeasured. On the support trade, bunkers change hands weekly. Measuring before and after, on independent instruments, is what makes every delivery note checkable.
Our highly trained marine surveyors carry out all types of marine surveys, ship surveys, and vessel inspections at Onne Port, Nigeria: vessel condition, on/off hire for the offshore support fleet, suitability inspections, hull and machinery, P&I, and bunker surveys, at the berth and in the roads of the Port of Onne. Cargo, tally, draft, and claims run with our cargo and project surveyors in Onne, and the full country practice from Marine and Cargo Surveys in Nigeria.
Onne runs on its offshore support fleet, and the fleet runs on charters that start and end with condition. Our surveyors attend on-hire and off-hire surveys for OSVs, supply vessels, and tugs: hull, decks, working gear, and machinery spaces recorded compartment by compartment, existing damage photographed and listed, and bunkers established at the same attendance, so delivery and redelivery are compared against a record instead of a memory.
Before a vessel is committed to a project lift, a tow, or an offshore run, the question is whether this vessel, with this gear, in this condition, suits this job. Our surveyors inspect the vessel and its equipment against the intended operation: cranes and lifting gear checked against the load, deck strength and securing points reviewed, and the findings stated plainly, so charterers, project owners, and underwriters commit to the fixture with the facts in hand.
Whatever brought you here rarely comes alone: fuel, cargo, and the vessel itself raise their questions together. Our units below answer them from the same desk, on one instruction line.
Hull and machinery damage on the support trade is investigated for underwriters and owners with cause, nature, and extent stated in the form adjusters use. P&I attendance runs impartial, one interest per matter, with first findings shared quickly. Bunker surveyors attend deliveries and redeliveries with soundings on our own instruments and the delivery note verified against what was actually measured, because on a fleet that bunkers weekly, the small differences add up to real money.
One team, one fight
The same marine surveying discipline runs at Lagos, Port Harcourt, Onne, Warri, and Calabar, so a vessel calling more than one Nigerian port keeps one file, one standard, and one point of contact for the whole rotation. Findings reach the instructing party first, and the report reads the same wherever it was written.
WhatsApp a Marine Surveyor ops@observater.com“The OSV redelivered under the same report structure it delivered under. No argument survived that.”
Offshore fleet manager
“They inspected the vessel against the job, not just the vessel. The crane limitation they flagged would have stopped the lift offshore.”
Project charterer, oil and gas
“Bunker figures verified at every rotation, on their instruments, with the calculation attached.”
Supply vessel operator, Onne
We answer 24/7, and a surveyor can be moving to any Onne berth or the anchorage at short notice, with who attends, when, and on what basis confirmed in writing before work begins.
The vessel’s condition recorded compartment by compartment, existing damage photographed and listed, holds and hatch covers inspected, and bunkers established at the same attendance, so delivery and redelivery are compared against a record instead of a memory.
Yes: the vessel and its equipment are inspected against the intended operation, cranes and gear checked against the load, and the findings stated plainly before the fixture commits.
Yes, from the same office: heavy lift supervision, marine warranty surveys, and out-of-gauge units, with our cargo and project surveyors in Onne.
Named surveyor, scope in writing. Before anything starts you know who attends, when, and exactly what they will do, on paper.
The fee agreed first. The fee is put in writing before work begins, so the decision is made with the numbers in front of you.
One interest per matter. If we act for the other side in your dispute, we tell you and decline. Independence is the product.
Work starts on your go-ahead. Nothing begins until you confirm in writing, and the findings reach you first, in confidence. We answer 24/7.
The fee depends on the scope: the vessel, the matter, and the number of attendances it needs. Tell us the vessel and the situation and we reply with the scope and the fee in writing before work begins, so the decision is made with the numbers in front of you.
Marine surveys at Onne Port, Nigeria are carried out by Observater Surveys and Services Group: independent, resident at the port, and answering around the clock. One email to the desk brings back the surveyor’s name and scope in writing, and attendance follows day or night.
It depends on the scope — the operation, the hours, and what must be attended. What never varies is the sequence: the fee is quoted in writing before attendance, agreed before boarding, and there are no additions invented afterwards. One email describing the vessel and the operation brings the figure back.
Wherever money changes hands on the vessel’s state: charters beginning or ending, sale and delivery, club entry, or before a cargo that punishes a dirty hold. The baseline taken then is the argument avoided later.
The figure taken today settles the argument that comes later
Tell us the vessel and the matter, and our marine surveyors confirm who attends, when, and on what basis, in writing, before anything starts.
Get a Marine Surveyor Moving Email the InstructionInternational Marine Cargo Surveyors, Claims Handlers and Technical Consultants in Africa. On-ground expertise, global reach: anywhere you go in Africa, we are already there, with capacity to serve globally.
Observater Surveys and Services Group · ops@observater.com · All attendances are performed under our standard terms of business, available on request. Also see: cargo and project surveyors in Onne · Marine Surveyors in Lagos · Nigeria.
From the Observater Desk
Whatever the vessel question, the cargo below has its own: outturn against the manifest, tally at the hook, condition as found, and the claims file that follows. The cargo desk at Onne answers it from the same practice, one instruction covering both.
Cargo surveyors in OnneInstruct the desk
When precision matters, Observater Surveys Group is your Partner of Choice
© 2026 Observater Surveys and Services Group. All rights reserved.