Flag standing is a number computed overnight — and seven points of it alone puts a ship on the US examination list

MUSCAT — Owners discuss flag reputation as though it were a matter of perception. It is not. It is a set of published formulas that convert a flag's detention record into inspection frequency, inspection frequency into a deficiency record, and a deficiency record into a vetting score that decides whether a vessel can lawfully be offered against a charterparty requiring oil major approvals. Each link in that chain is documented. Only the final commercial decision is discretionary. Link one: the flag sets how often the ship is inspected The Paris MoU's Ship Risk Profile assigns every vessel to high, standard or low risk, and that category determines inspection priority, the interval between inspections and the type of inspection conducted. The parameters are the type and age of ship, the number of deficiencies and detentions recorded over the preceding three years in the MoU area, the performance of the flag State, the performance of the recognised organisations acting for it, and the performance of the company responsible for ISM management. Company performance is calculated from deficiencies and detentions across the company's fleet over 36 months against the average for all inspected vessels, ranked very low, low, medium or high, with a refusal of access to any of its ships lowering the ranking. The profile is recalculated daily, overnight. Inspection results for other ships in the same ISM company can change a vessel's profile immediately, and updated flag and recognised organisation performance tables feed directly into it. The consequence is a large and compounding difference in exposure. A high-risk ship falls due for inspection between the fifth and sixth month after its last, and inspection becomes mandatory after the sixth. A standard-risk ship falls due between the tenth and twelfth month, mandatory after twelve. A low-risk ship falls due between the twenty-fourth and thirty-sixth, mandatory after thirty-six. Across three years that is up to six inspections against one. ANALYSIS. The compounding is the point owners miss. Six inspections are not merely six times the cost and disruption of one — they are six opportunities to record deficiencies, and recorded deficiencies are themselves a scored parameter in the same profile. A poor flag raises inspection frequency, which raises the probability of the deficiency record that raises the risk category further. The loop runs in the other direction too, which is why improvement is slow once it begins. Link two: in the United States, the flag alone can trigger an examination The US Coast Guard's targeting matrix is more explicit, because it is arithmetic. Points are assigned by column. Ship management attracts five points where the owner, operator or charterer is listed. The flag State attracts seven points where the flag's detention ratio is at least twice the all-flag average, two points where it falls between the average and twice the average, and none where it is below the average. The recognised organisation attracts five points for a detention ratio between one and two per cent and three points between half a per cent and one per cent, with none below half a per cent — and a ratio of two per cent or more places the vessel in Priority I outright. Vessel history attracts five points each for a detention, denial of entry or expulsion in the previous twelve months, and one point each for operational restrictions, reportable casualties or marine violations in the same period. Priority I begins at seventeen points, or on independent triggers including a casualty affecting seaworthiness, and port entry may be restricted until the vessel is examined. Priority II runs from seven to sixteen points, or where requirements from a previous examination are outstanding, or where there has been no examination in the preceding twelve months. Six points or fewer is non-priority. QUALSHIP 21 vessels have no points added in the ship particulars column, though age reductions still apply. Seven points is the Priority II threshold, and a flag whose detention ratio is twice the average scores exactly seven. On my arithmetic from the published matrix, a vessel with no detentions, no casualties, no operational restrictions and unlisted management reaches Priority II on its flag alone. Add a recognised organisation in the one-to-two per cent band and the total is twelve. Add listed management and it is seventeen — Priority I, with port entry potentially restricted until examination. A single detention in the preceding year on top of that takes it to twenty-two. That is the cleanest available demonstration of the thesis. A technically sound, well-maintained, incident-free ship can be targeted in the United States because of the register it flies. Link three: vetting scores the flag, and scores changing it Commercial vetting picks the signal up from there. RightShip's risk rating draws on nine groups: regulator risk, casualties risk, port State control performance, builder risk, size, age, type, the port State control performance of vessels sharing the same DOC manager, and continuity risk. Flag State performance is not a standalone factor — it is assessed within regulator risk, which models the interaction between a vessel's classification society and its flag State. Continuity risk models the consistency of standards and systems across DOC holders, flag States and classification societies. No weights are published; the model's relative importance is vessel-specific, and the rating display surfaces the three to six factors with the greatest bearing on a particular ship. ANALYSIS. Two features of that design deserve attention from anyone considering a flag change as a reputational fix. First, flag and class are scored together rather than separately, so a grey-list flag paired with a well-rated society is a materially different proposition from the same flag paired with an unassessed one — and the combination, not either element, is what the model reads. Second, continuity risk means that inconsistency across flag States is itself a scored negative. The act of reflagging is an event in the model. An owner who moves register to escape a poor flag performance record should expect the improvement to appear over time rather than at the next recalculation, and should expect the move itself to carry a small cost in the interim. Link four: the charterparty converts the score into money The final link is contractual, and the case law is settled enough to be relied upon. Oil major approval clauses take two forms. Under the Shelltime 4 form considered in Dolphin Tankers Srl v Westport Petroleum Inc [2010] EWHC 2617 (Comm), owners used best endeavours to obtain pre-approvals and had to secure a minimum of three major oil company approvals within sixty days of delivery, failing which charterers could extend the period or place the vessel off-hire; where approvals lapsed later, charterers could terminate after a further sixty days. Separately, a single failed vetting inspection did not of itself justify off-hire or a claim, but three consecutive failures caused by owners or the vessel allowed off-hire, constituted a breach and permitted cancellation on thirty days' notice. The court held that "oil major" covered all six recognised companies rather than only the five named in the clause, and that a pass arranged by owners could not break a run of qualifying rejections. The stricter form appears in Transpetrol Maritime Services Ltd v SJB (Marine Energy) BV [2010] EWHC 3374 (Comm), where owners warranted that the vessel was approved by named oil companies and would remain so throughout the charter. The court held that approval letters had to remain in place for the duration, and that owners were in breach where an event known to them would have caused an issuer to withdraw approval. Adverse SIRE inspections at Antwerp, carrying 33 comments from one major and more than twenty from another, meant a third would not have approved the vessel; a cargo had to be sold at a considerable discount and the claim advanced was US$3,247,000. Vetting itself rests on pooled inspection reports in the SIRE database, which all member companies can read. Owners receive the report and may comment, and those comments are appended. Majors rarely grant approvals in advance, and approval letters frequently state that no approval has been given, with express approvals usually tied to specific voyages rather than to a period. ANALYSIS. Put the chain together and the commercial exposure is concrete rather than reputational. A weaker flag raises the inspection frequency. Higher inspection frequency raises the volume of recorded observations. Recorded observations populate the SIRE history that majors read. A run of three rejections attributable to the vessel triggers off-hire, breach and a cancellation right under the standard form — and under a continuing warranty, a single known event sufficient to cause withdrawal of an approval is itself the breach. The owner's flag decision therefore sits upstream of a contractual trigger measured in off-hire days and, in Transpetrol, in a seven-figure claim. It is not a procurement choice with a reputational tail. It is an input to a formula with a cancellation right at the end of it. What the current lists say The Paris MoU's 2025 performance lists rate 69 flag administrations on a three-year rolling model, requiring at least 30 inspections for a flag to be rated and 60 for a recognised organisation. Reporting of those lists places 40 flags on the white list, with the top five by excess factor being the Cayman Islands on 299 inspections and no detentions at −1.95, Sweden on 312 inspections and one detention at −1.81, Norway on 1,742 and 23 at −1.72, Denmark on 1,163 and 15 at −1.68, and Japan on 244 and one at −1.67. France, the Netherlands and Singapore are also reported near the top. The five highest-rated recognised organisations are all rated high: ABS, DNV, Lloyd's Register, ClassNK and Bureau Veritas. One caution on the figures: two accounts of the same 2025 lists differ on the lower bands, one giving 17 grey and 12 black and another 19 grey and 10 black, which suggests different snapshots or list versions. The MoU's own published lists should be checked before any figure is used in a vetting submission or a charterparty negotiation. The International Chamber of Shipping's own table, published on 27 January 2026, assesses flags against 19 criteria that include port State control records from the Paris MoU, Tokyo MoU and US Coast Guard, ratification of IMO and ILO conventions, and the use of high-performing recognised organisations under the RO Code — a reminder that the flag's choice of society is itself a scored attribute of the flag. What owners should actually do Before fixing to the United States, check the flag's detention ratio against the all-flag average, because that single comparison determines whether the vessel starts at zero, two or seven points. Check the recognised organisation's ratio on the same basis, since two per cent or more is Priority I regardless of anything else. Before accepting an approvals clause, establish which form it takes. A best-endeavours obligation with a three-rejection trigger is a different risk from a continuing warranty that approvals will remain in place, and the second has produced a seven-figure claim on facts no worse than a poor inspection. Before reflagging for reputational reasons, price the continuity cost and the time lag. The improvement is real but it accrues over a three-year rolling window, and the move is itself a scored event in at least one commercial model. And treat company performance as the parameter most within the owner's control. In the Paris MoU profile it is calculated across the whole fleet over 36 months, and an inspection result on one ship can change another's risk category overnight — which means a single poorly prepared vessel raises the inspection exposure of every ship under the same DOC. What to monitor The Paris MoU's own published white, grey and black lists and its recognised organisation table, as the authoritative versions of the figures circulating in trade reporting. The USCG's annual targeted flag list and QUALSHIP 21 eligibility, which move the point score directly. Any revision to the Ship Risk Profile parameters in Annex 7 of the Memorandum. RightShip's criteria updates, which have been revised to version four. And the ICS table's next edition, for the flag-level view that charterers' own compliance teams increasingly cite. The bottom line A flag is often selected on registration cost, crew nationality rules and the speed of the certificate. Those are the three attributes least connected to what the flag actually does to the vessel's trading life. What it does is set a score. The score sets how often the ship is boarded, which shapes the record that commercial vetting reads, which determines whether the vessel can be offered against a clause whose breach carries off-hire and cancellation. Every step in that sequence is published, formulaic and recalculated without anyone's discretion. The only part of it that feels like reputation is the last one — and by then the number has already been decided. ARK Management SPC — Marine Consultancy & Brokerage, Muscat, Sultanate of Oman.