TMSA explained: how Tanker Management and Self Assessment works

TMSA, Tanker Management and Self Assessment, is OCIMF's framework for tanker operators to measure their own management system against industry best practice. The operator scores itself against 266 key performance indicators across 13 elements (one of them split into 6 and 6A), publishes the result through OCIMF's SIRE programme, and oil majors read it when they vet the fleet.

What is TMSA and who requires it?

TMSA is a self-assessment, not an inspection. The operator's shore management works through the KPIs element by element, decides which stage the company genuinely operates at, and records the result. OCIMF describes the mechanism plainly: the self-assessments provide "the minimum standard expected (level 1) plus three levels of increasing standards or performance", and companies use the results to build phased improvement plans. TMSA is the tanker title in a wider OCIMF family of Management Self Assessments that now covers offshore vessels (OVMSA), marine terminals (MTMSA) and ship-to-ship service providers.

Nobody requires it in the regulatory sense. No convention mentions TMSA, no flag checks it, and no PSC officer will ever ask for it. The requirement is commercial, and it is absolute at the top of the market: oil majors expect a published, current TMSA from any operator whose vessels they charter. DNV puts it in one sentence: TMSA "may be voluntary in principle but for tanker operators seeking regular charters from oil majors meeting its requirements is a fundamental commercial imperative". Where the submission sits in the wider screening chain is covered in charterer vetting explained.

What are the 13 TMSA elements?

TMSA3 organises its 266 KPIs under 13 elements, covering the whole span of a shipping company's management system, from the boardroom to the mooring deck. Element 6 is split in two, with mooring and anchoring carrying their own element number, 6A:

Element 13, maritime security, was new in TMSA3, and element 10 widened from environmental management to include energy management. The list is worth reading as a map of what oil majors consider chartering-relevant: only elements 4, 5, 6, 6A and 11 are mainly about the ship. The rest interrogate the office that runs it.

What are the four performance stages?

Each KPI is assessed at one of four stages of increasing standard. OCIMF's own framing: "the questions in the MSAs are set out in four stages... the higher the stage the higher the standard". Stage 1 is the minimum expectation, broadly the level a functioning ISM safety management system already implies. Stages 2 and 3 add depth: procedures that are measured, reviewed and improved rather than merely written. Stage 4 describes leading practice.

Two things about the stages matter more than their labels. First, a stage is claimed per KPI, not per company, so a submission is a mosaic of 266 individual claims, each of which should be defensible on its own. Second, the assessment is meant to be a cycle, not a certificate: OCIMF recommends re-taking the self-assessment every 12 months, and the intended use is a phased improvement plan, with the company closing the gap between the stage it claimed and the stage above it.

How is TMSA different from SIRE 2.0?

TMSA assesses the office; SIRE 2.0 inspects the ship. TMSA is written by the operator about its own management system, at its own desk, on its own schedule. A SIRE 2.0 inspection is conducted by an accredited third-party inspector on board a specific vessel, against a questionnaire compiled for that vessel, with photographs and structured observations recorded on a tablet. One is a self-portrait, the other a snapshot taken by a stranger.

They meet in the same database, and that is the point. Both live in OCIMF's SIRE programme, and a vetting reviewer reads them side by side. SIRE 2.0's question structure makes the comparison sharp: every question can be answered across hardware, process and human dimensions, so an inspection that keeps finding process and human observations on a fleet is direct evidence about the management system its operator scored highly in TMSA. The vessel-side regime and its preparation are covered in SIRE 2.0 and the CVIQ.

How do oil majors use TMSA in vetting decisions?

As one input into a company-level judgement that each major makes by its own rules. OCIMF publishes no threshold, no pass mark and no ranking; it notes only that report recipients apply their own screening, much of it automated. A major's vetting department typically reads the TMSA alongside the fleet's SIRE reports, PSC history and incident record, and forms a view of the operator, not just the vessel. Access is in the operator's hands: the operator chooses whether all registered OCIMF member companies can view the published report or only selected ones, and members can request access.

The self-assessed format is not taken on trust. The stages an operator claims are tested against everything else the reviewer can see, and majors follow up with their own questions when the picture does not cohere. A company that claims stage 3 in incident investigation while its fleet's inspection reports keep surfacing the same findings has written a claim its own record contradicts. Chemical-sector charterers run the same logic through their own scheme, where the CDI questionnaire reaches into management topics too; see how CDI inspections work.

What does a credible TMSA evidence file look like?

One in which every claimed stage has objective evidence behind it, dated, attributable and current. The KPIs are written as verifiable statements, so the file should verify them:

The hard part is not producing evidence once; it is keeping the file alive. Element 4 claims about maintenance, element 6 and 6A claims about cargo and mooring operations, element 11 claims about drills: all of them decay unless the ships keep feeding the file. Operators who treat evidence collection as a special exercise before a review tend to hold a weaker file than those whose crews capture it as routine, which is the same discipline behind a good pre-vetting, described in how to prepare for charterer vetting.

Which gaps most often weaken a TMSA submission?

The recurring weaknesses are patterns of overclaiming, and a reviewer can spot each one from their desk. The stage claimed fleet-wide but evidenced on one vessel. The procedure quoted in the submission that the crew on board cannot demonstrate, which a SIRE 2.0 human-factors response will surface within a question or two. The assessment that has not moved in three years, when the framework itself assumes a 12-month cycle and a visible improvement plan. And the elements that exercise the office rather than the ship, management of change and measurement-analysis-improvement above all, claimed at high stages with nothing in the record showing the process ever ran.

None of this is measured in a published statistic; OCIMF releases no data on how submissions score. But the structural point stands without one: TMSA is a set of claims, vetting is the process of checking claims against evidence, and the submissions that hold up are the ones where the evidence existed before the claim was written.