Ship certificates & documents: what to carry, where, and when

A trading ship's certificates and documents run to dozens of items — statutory certificates, record books, plans and crew papers, each under a different convention, each with its own place, validity and survey cycle. Built for the people who have to keep a ship legal: owners, operators, DPAs (Designated Persons Ashore) and technical superintendents, masters and mates — and the charterers, brokers and buyers who screen a ship's papers before they commit. The rules are scattered across SOLAS, MARPOL, the Load Line and Tonnage conventions, MLC, the ISM and ISPS codes, class rules and flag circulars — there is no single "what / where / when" list. We assembled one here.

Screening a counterparty's ship? Its certificate status, class and flag are exactly the signals the rynda fleet tools and vessel identity reference help you key on — join everything on the IMO number.

📖 See also: Port State Control · CII, EEXI & EEDI ratings · Ship's particulars decoded

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Contents

• At a glance
• The four families of paperwork
• The master list of ship certificates and documents
• The HSSC survey regime and the anniversary date
• Class surveys
• Record books and logs
• Plans and manuals
• Crew certificates and documents
• Commercial and office documents
• The renewal calendar — once, yearly, and five-yearly
• Edge cases and common confusions
• A worked example — screening a ship's papers
• For developers and fleet screeners
• FAQ
• References

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At a glance

The short version, if you read nothing else:

• A ship's papers split into four families: statutory certificates (mandated by IMO/ILO — the UN's International Maritime and International Labour Organizations — conventions, issued by the flag state or a Recognised Organisation (RO) — usually the classification society — on its behalf), class certificates (from the classification society, on the ship's structure and machinery), commercial/insurance documents (P&I — Protection & Indemnity — cover, hull insurance, liability "blue cards"), and crew documents (STCW competency, medical fitness, employment).
• The authoritative master list is IMO's FAL.2/Circ.133 — "List of certificates and documents required to be carried on board ships, 2022." Flag states and class societies publish per-ship checklists on top of it.
• Most statutory safety and pollution certificates run on a 5-year cycle under the Harmonized System of Survey and Certification (HSSC), kept valid by annual and intermediate endorsements — a surveyor's dated stamp on the certificate confirming a periodic survey was passed. A renewal survey re-issues them every five years.
• A few certificates never expire: the International Tonnage Certificate, the International Energy Efficiency (IEE) Certificate, the Anti-Fouling System (IAFS) Certificate and the Minimum Safe Manning Document are valid for the life of the ship (until a major change). Others run to their own clock — the Ship Sanitation certificate is 6 months; insurance/liability certificates are typically annual.
• "Where" matters as much as "what." Originals live on board (many now as accepted electronic certificates); the company's ISM Document of Compliance and much of the compliance system live in the office; record books are filled in and retained on set schedules.
• A missing, expired or un-endorsed certificate is a Port State Control detention item — and among the most common. The paperwork is not bureaucracy for its own sake; it is the evidence the ship is what it claims to be.

This is a practical reference, not legal or flag-state advice. The controlling texts are the conventions themselves and your flag/class instructions; confirm the exact list, thresholds and validities for your ship, its type, size and trade.

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The four families of paperwork

Before the list, the mental model — who issues what, and why:

• Statutory certificates prove compliance with international conventions: SOLAS (Safety of Life at Sea), MARPOL (marine pollution), the Load Line and Tonnage conventions, MLC (the Maritime Labour Convention), the BWM (ballast-water management) convention, plus the ISM (International Safety Management) and ISPS (International Ship and Port Facility Security) codes. The flag state is responsible, but almost always delegates the survey and issuance to a Recognised Organisation (RO) — in practice the classification society acting "on behalf of the Administration."
• Class certificates are the classification society's own product: the ship's hull, machinery and equipment meet the class rules. Class is a private-law matter, but statutory and class surveys are run together, and losing class effectively grounds the ship (insurance and flag are conditioned on it).
• Commercial and insurance documents — P&I entry, hull & machinery cover, and the liability "blue cards" (an insurer's letter confirming the cover that backs a statutory financial-security certificate — CLC, Bunkers, Wreck Removal, MLC) — sit mostly with the owner/manager's office, with copies on board.
• Crew documents — STCW (Standards of Training, Certification and Watchkeeping) certificates of competency, endorsements, medical fitness, the seafarer employment agreement — belong to the individual and are held on board for inspection.

The rest of this article is the "what / where / when" for each family.

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The master list of ship certificates and documents

The data asset — the core statutory certificates, what they cover, where they live and how long they last. "GT" is gross tonnage — a volume index of the ship, not a weight (see the ship's particulars reference). Validity is the maximum period; the certificate must be kept alive by the surveys in the HSSC survey regime below.

Certificates most trading ships must carry

DMLC = Declaration of Maritime Labour Compliance (Part I from the flag, Part II from the shipowner).

Certificates for particular ships

Thresholds and applicability vary by flag and trade; the tables give the common case.

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The HSSC survey regime and the anniversary date

A certificate is only the receipt; the survey is what earns it. Since 2000 the statutory certificates are aligned under the Harmonized System of Survey and Certification (HSSC) so a ship has one anniversary date and one 5-year clock instead of a dozen unsynchronised ones.

The survey types, in order:

• Initial survey — the full survey before the first certificate is issued (or after a major conversion).
• Annual survey — a lighter yearly confirmation. Window: within 3 months before or after the anniversary date (a ±3-month, 6-month-wide window).
• Intermediate survey — deeper than an annual, carried out between the 2nd and 3rd anniversary, in lieu of one of those annual surveys.
• Renewal (periodical) survey — the full re-survey every 5 years that re-issues the certificate. It may be completed within 3 months before expiry with no loss of validity — the new certificate still runs five years from the old expiry date, not the survey date.

The anniversary date is the day and month corresponding to the certificate's expiry; once set, it stays fixed for the five-year period, so every statutory survey shares it. The management-system certificates keep their own audit rhythm on the same clock: the DOC gets an annual audit, while the SMC, ISSC and Maritime Labour Certificate each get one intermediate audit/inspection between the 2nd and 3rd anniversaries.

One exception: MARPOL Annex IV (the ISPP/sewage certificate) has only an initial and a renewal survey — no annual or intermediate. Every other statutory certificate follows the full annual/intermediate/renewal pattern.

Miss a window and the certificate can lapse — which, in a port, means a PSC detention.

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Class surveys

Running alongside the statutory clock is the classification society's own survey cycle on hull and machinery:

• Special (Renewal) Survey — the big one, every 5 years: extensive examination, thickness measurements, testing. Can be taken in one go or spread as a continuous survey.
• Annual Survey — a general condition survey, ±3 months of the anniversary, like the statutory annual.
• Intermediate Survey — between the 2nd and 3rd anniversary of the special survey.
• Docking / Bottom Survey — the underwater hull: two in any five-year period, with the interval not exceeding 36 months. An approved in-water survey can substitute for one of the two on many ships.
• Tailshaft (propeller shaft) survey and boiler survey — on their own multi-year intervals.
• Continuous Survey Machinery / Hull (CMS/CSH) — rolling five-year programmes that spread the special survey's items across the cycle.

Older tankers and bulk carriers carry the Enhanced Survey Programme (ESP) — extra thickness measurements and close-up surveys — and pre-MARPOL-standard tankers may need a Condition Assessment Scheme (CAS) statement. Outstanding items become Conditions of Class / Recommendations with deadlines; letting one run overdue can suspend class.

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Record books and logs

Certificates prove status; record books prove conduct — the running log that PSC and vetting inspectors cross-check against the certificates. Kept on board, filled in as events occur, and retained for set periods.

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Plans and manuals

Ship-specific plans and manuals — approved once, kept current, and central to the ISM safety-management system:

• SOPEP / SMPEP — Shipboard Oil (or Marine) Pollution Emergency Plan (MARPOL Annex I/II).
• Ballast Water Management Plan (BWM Convention).
• Garbage Management Plan (MARPOL Annex V; ships ≥ 100 GT or ≥ 15 persons).
• SEEMP — Ship Energy Efficiency Management Plan (MARPOL Annex VI): Part I (efficiency measures), Part II (the fuel-consumption DCS — Data Collection System — plan), Part III (the CII implementation plan).
• Cargo Securing Manual (SOLAS VI/VII).
• Ship Security Plan (SSP) — the confidential ISPS plan (held by the SSO — Ship Security Officer — not shown to PSC in full).
• Stability booklet / loading manual and, on many ships, a loading instrument.
• VOC (Volatile Organic Compound) Management Plan (crude-oil tankers), Polar Water Operational Manual (polar trades), Ship-to-Ship Transfer Plan (tankers).
• The ISM Safety Management System manuals themselves — procedures, checklists, the DPA (Designated Person Ashore) link.

Unlike record books, these are living documents: they must reflect the actual ship, and an out-of-date plan (wrong equipment, superseded contacts) is itself a finding.

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Crew certificates and documents

The people are certified too, under STCW (Standards of Training, Certification and Watchkeeping):

The ship's Minimum Safe Manning Document sets the number and rank of crew required; the certificates above prove each person meets it.

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Commercial and office documents

Not convention-mandated in the same way, but no ship trades without them — and they are exactly what a charterer or buyer screens:

• P&I Certificate of Entry — third-party liability cover from a P&I (Protection & Indemnity) club.
• Hull & Machinery insurance — the asset cover.
• The liability "blue cards" — the insurer's confirmation that backs the statutory financial-security certificates: CLC (Civil Liability Convention, oil tankers > 2,000 t persistent oil), Bunkers Convention (ships > 1,000 GT), Nairobi Wreck Removal (≥ 300 GT), MLC repatriation/financial-security, and — on passenger ships — Athens (PAL 2002) passenger-liability. These are typically annual, tied to the P&I policy year (renewed 20 February).
• Classification certificate and the class survey status report — the live list of surveys due and any conditions of class.
• Q88 — the standard tanker particulars questionnaire; SIRE / CDI (the oil-major and chemical-industry ship-vetting schemes) inspection reports for tankers.
• The company's ISM Document of Compliance — held in the office, copy on board.
• Ship's registry / mortgage documents and the Continuous Synopsis Record history.

A ship's insurance, class and certificate status together are the due-diligence picture: current cover, class in good standing, no overdue conditions, a clean PSC record.

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The renewal calendar — once, yearly, and five-yearly

The "when," collapsed into a cadence. This is the single view most people are actually looking for:

Note the ISPP (sewage) certificate: it is re-issued every 5 years but has no annual or intermediate survey (MARPOL Annex IV is the one exception to the yearly pattern). Two operational rules make the calendar workable: the ±3-month window on annual/intermediate surveys, and the 3-months-before-expiry allowance on renewals with no loss of validity. Both let a superintendent line surveys up with a convenient port or a scheduled dry-docking instead of an inconvenient anniversary at sea.

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Edge cases and common confusions

• Two different "DOCs." The ISM Document of Compliance (the company's certificate) is not the Document of Compliance for the carriage of dangerous goods (a ship certificate under SOLAS II-2/19). Same acronym, unrelated documents.
• Combined vs separate SOLAS safety certificates. A cargo ship may hold three certificates (Construction, Equipment, Radio) or one combined Cargo Ship Safety Certificate — flag's choice. Passenger ships instead get a single Passenger Ship Safety Certificate, valid only 12 months.
• The certificate is not the survey. An in-date certificate with an overdue annual endorsement is invalid — PSC checks the endorsements on the back, not just the expiry on the front.
• Interim / short-term certificates. A new ship, a re-flag or a new company gets interim certificates until the full survey — a 6-month interim SMC and ISSC, an interim DOC of up to 12 months, or provisional class. Legitimate, but a screener should note them as not yet the full article.
• Electronic certificates. Flags increasingly issue electronic certificates (accepted under IMO FAL.5/Circ.39/Rev.2) with a verification URL and unique tracking number instead of paper. Valid worldwide, but PSC will verify them online — the QR/URL must resolve.
• "Statement of Compliance" ≠ "Certificate." The DCS/CII Statement of Compliance (fuel-data and carbon-intensity reporting under MARPOL Annex VI) is issued annually and is separate from the IEE Certificate — see the CII reference.
• Tonnage never expires — but a conversion can void it. The International Tonnage Certificate has no expiry, yet an alteration that changes GT/NT (gross/net tonnage — a conversion, a new deck) requires a fresh one.
• Ship Sanitation is WHO, not IMO. It sits under the International Health Regulations, not a maritime convention — which is why its 6-month clock is out of step with everything else.

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A worked example — screening a ship's papers

Scenario: a charterer is about to fix a 12-year-old, 58,000 DWT Supramax bulk carrier and runs a paper check before committing.

1. Identity      → confirm IMO number (permanent); cross-check name/flag on the CSR
2. Class         → class in good standing? Special Survey (5-yr) date? Any overdue
                   Conditions of Class? Last docking within 36 months?
3. Statutory     → Load Line, Cargo Ship Safety (Construction/Equipment/Radio),
                   IOPP, IAPP, ISPP, BWM — all in date AND annually endorsed?
4. Management    → DOC (company) and SMC (ship) valid? MLC in date? ISSC valid?
5. Carbon        → IEE Certificate present; DCS/CII Statement of Compliance current;
                   CII rating (A–E) acceptable for the trade?
6. Insurance     → P&I entry current; CLC/Bunkers/Wreck blue cards valid
7. PSC history   → detentions in the last 36 months? (Ship Risk Profile signal)

The two findings that most often kill a fixture or cut the rate: an overdue annual endorsement (an in-date certificate that has quietly become invalid), and an overdue condition of class or docking. Neither shows up if you only read the expiry dates on the front of the certificates — which is why the survey-status report and the CSR matter as much as the certificates themselves. This is the same due-diligence picture the fleet tools, PSC reference and voyage-economics calculator are built around.

This is a screening checklist, not a substitute for a physical inspection, class confirmation of survey status, or legal/insurance due diligence.

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For developers and fleet screeners

• Key everything on the IMO number. Certificates, class status, flag and detention history all attach to the ship's permanent IMO number, which survives a re-flag, rename or sale — unlike the name, MMSI or call sign. Join on it so a ship's compliance record follows it.
• Model validity as {issued, expires, lastEndorsed, nextSurveyDue, window}, not a single expiry. The compliance-critical field is often the endorsement, not the expiry: a certificate can be "in date" yet invalid because an annual survey was missed. Carry the anniversary date and the ±3-month window so "due soon" is computable.
• Distinguish life-of-ship certificates from cyclic ones. Tonnage, IEE, EIAPP, IAFS and the Safe Manning Document have no expiry — model them as expires: null with an "on change" trigger, not as overdue.
• Electronic certificates are machine-verifiable. Under IMO FAL.5/Circ.39/Rev.2 an e-certificate carries a unique tracking number and a verification URL — the right primitive for automated screening, versus scanning a PDF.
• The rynda fleet tools surface the durable identity, flag and status that a certificate and class check builds on — the same inputs a PSC Ship Risk Profile is scored from.

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FAQ and common confusions

Q: What certificates must a ship carry?
A: Statutory certificates under the IMO/ILO conventions — Registry, Tonnage, Load Line, the SOLAS safety certificates, IOPP/IAPP/IEE/ISPP (MARPOL), the Ballast Water and Anti-Fouling certificates, the ISM (SMC/DOC), ISPS (ISSC) and Maritime Labour certificates, plus type-specific ones (e.g. a chemical tanker's Certificate of Fitness). The authoritative master list is IMO FAL.2/Circ.133. Class, insurance and crew documents come on top.

Q: Which certificates are required on board as per SOLAS and the FAL Convention?
A: SOLAS itself mandates the ship-safety certificates (Construction, Equipment, Radio — or the combined Cargo Ship Safety Certificate — plus the ISM SMC/DOC and the ISPS ISSC). The consolidated list of everything required on board across all the conventions is IMO's FAL.2/Circ.133, published under the Facilitation (FAL) Convention. MARPOL, Load Line, Tonnage, MLC, BWM and the AFS Convention each add their own certificates on top.

Q: How long is a ship's certificate valid?
A: Most statutory safety and pollution certificates run 5 years, kept alive by annual and intermediate endorsements. A few never expire (Tonnage, IEE, EIAPP, Anti-Fouling, Minimum Safe Manning). The Ship Sanitation certificate is 6 months; a Passenger Ship Safety Certificate is 12 months; insurance/liability certificates are usually annual.

Q: Which ship certificates do not expire?
A: The International Tonnage Certificate, the IEE (energy efficiency) Certificate, the EIAPP engine certificate, the Anti-Fouling System (IAFS) Certificate and the Minimum Safe Manning Document — all valid for the life of the ship (or engine) unless a major change (a conversion, a re-flag, a change of manning basis) triggers re-issue.

Q: What is the Harmonized System of Survey and Certification (HSSC)?
A: The regime that aligns all the statutory certificates on one anniversary date and one 5-year clock, with a shared survey pattern — initial, annual (±3 months of the anniversary), intermediate (around 2.5 years) and renewal (every 5 years, completable up to 3 months early with no loss of validity). The one exception is the ISPP (sewage) certificate, which has only initial and renewal surveys.

Q: What's the difference between statutory and class certificates?
A: Statutory certificates prove compliance with international conventions and are the flag state's responsibility (usually delegated to a class society as a Recognised Organisation). Class certificates are the classification society's own confirmation that the hull and machinery meet its rules. In practice the two survey cycles are run together.

Q: Where are a ship's certificates kept?
A: Original statutory and class certificates are held on board for inspection (increasingly as accepted electronic certificates). The company's ISM Document of Compliance and much of the SMS live in the office, with a copy aboard. Record books are filled in and retained on board.

Q: Are electronic ship certificates valid for Port State Control?
A: Yes. Under IMO FAL.5/Circ.39/Rev.2 flag states may issue electronic certificates carrying a unique tracking number and a verification URL instead of paper. They are valid worldwide, but PSC will verify them online — so the QR code / URL must resolve.

Q: What happens if a certificate is expired or missing?
A: It's one of the most common Port State Control detention grounds. A missing, expired or un-endorsed certificate can stop the ship from sailing until it's put right — and it feeds the ship's risk profile, drawing more inspections.

Q: Is a certificate valid if the annual survey was missed?
A: No. A certificate stays valid only while its endorsements are current. An in-date certificate whose annual survey lapsed is invalid — which is why inspectors and screeners read the endorsements on the back, not just the expiry on the front.

Q: What is the Continuous Synopsis Record (CSR)?
A: A running, on-board history of the ship required by SOLAS XI-1/5 — flag, owner, ISM company, class and name over time. Every change adds a new entry, so the CSR is a quick way to see whether a ship's identity, ownership or class has churned.

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References

• IMO — FAL.2/Circ.133, "List of certificates and documents required to be carried on board ships, 2022" — the authoritative master list.
• IMO — Survey Guidelines under the HSSC (Assembly Resolution A.1186(33), 2023) — the survey types, windows and the anniversary-date rule.
• The conventions themselves: SOLAS, MARPOL (Annexes I–VI), Load Line 1966/88, Tonnage 1969, MLC 2006, BWM Convention, AFS Convention, and the ISM and ISPS Codes.
• WHO — International Health Regulations (2005) — the Ship Sanitation Control / Exemption Certificate (6-month validity).
• Classification societies (Lloyd's Register, DNV, ClassNK, ABS, BV) — class survey cycles, ESP/CAS and conditions of class; and the P&I clubs for the liability certificates and blue cards.
• rynda fleet tools, vessel identity reference and Port State Control reference.

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Document version

• 2026-07 — first public version. The four families of ship paperwork — statutory, class, commercial/insurance and crew — with a master certificate registry (what/where/validity), the HSSC survey regime, record books, plans, crew documents and a renewal calendar, in one frame. Conventions, thresholds and validities change; confirm against FAL.2/Circ.133 and your flag/class instructions.