Flag-State Inspection and Class Survey Checklist: HSSC & IACS

Every merchant ship and commercial yacht answers to two primary authorities before a Port State Control officer ever steps onto the gangway: the flag administration whose ensign the ship flies, and the classification society (Recognized Organization, or RO) that certifies hull strength, propulsion and machinery reliability and — where delegated by the flag — statutory SOLAS, MARPOL and Load Line compliance.

• Classification surveys (IACS UR Z1, Z7, Z10): Carried out by surveyors from societies such as DNV, Lloyd’s Register (LR), ABS, Bureau Veritas (BV), ClassNK, RINA, CCS, Korean Register (KR) or IRClass (IRS). They verify that the structure, hatch covers, tanks, piping, steering gear, main and auxiliary machinery, electrical plant and automation remain in class condition, and they endorse the statutory certificates delegated to the RO under the IMO Harmonised System of Survey and Certification (HSSC).
• Flag-state Annual Safety Inspections (ASI / FSI): Carried out by an authorised Nautical Inspector appointed by the flag state (for example, a Liberia LISCR, Marshall Islands RMI, Panama AMP, Malta Transport Malta, Bahamas BMA, Singapore MPA, Hong Kong MD, UK MCA, India DG Shipping or USCG inspector). The objective is an operational audit of crew competence, drills, STCW endorsements, rest hours, MLC 2006 living and working conditions, ISM implementation and bridge/engine-room readiness — catching detainable defects before a foreign Port State Control inspection does.

Under IMO Resolution A.1207(34) (Survey Guidelines under the Harmonized System of Survey and Certification, 2025, which revoked A.1186(33)) and IACS Unified Requirements UR Z1, Z7 and Z10, ships operate on a 5-year certification cycle anchored to a harmonised anniversary date:

Missing an HSSC ±3-month window automatically invalidates the statutory and class certificates until the survey is completed and endorsed. You can track every certificate’s anniversary date and ±3-month window offline in the Certificates.

When an IACS surveyor boards for an Annual or Intermediate survey, the visit follows a predictable sequence from the Master’s office to the weather deck, bridge and engine room:

• Certificates, Survey Status Report & Conditions of Class: The surveyor first reconciles the vessel’s Class Survey Status Report against every original statutory certificate (Load Line, Safety Construction, Safety Equipment + Form E, Safety Radio + Form R, IOPP + Form A/B, IAPP + Supplement, ISPP, BWM, AFS, IHM, ISM SMC, ISPS ISSC and MLC). Any open Condition of Class, Recommendation or Memorandum approaching its due date must have repair records, NDT reports or temporary class-approved arrangements ready.
• Load Line & weathertight closures (IACS UR Z7): Plimsoll marks and deck lines permanently cut in and painted in contrasting colour; cargo hatch covers, coamings, cleats, wedges and rubber gaskets hose-tested or ultrasonic-tested; forecastle and poop weathertight doors; air pipe automatic ball/float closing devices on exposed decks (checking that floats are free and flame screens are intact); ventilator dampers marked Open/Closed; and accommodation ladders / pilot transfer arrangements load-tested under SOLAS II-1/3-9.
• Machinery, steering gear, emergency power & CMS: If the ship operates under Continuous Machinery Survey (CMS) or a Planned Maintenance Scheme (PMS) approved by class, the Chief Engineer presents the cyclic CMS items due during the window. On the floorplates, the surveyor witnesses main and auxiliary steering gear local and bridge changeover, emergency generator automatic start on simulated mains failure (connecting within 45 seconds under SOLAS II-1/44) plus independent secondary starting, bilge high-level alarms, 15 ppm OWS automatic stopping device, remote fuel-oil quick-closing valves, engine-room fire dampers, switchboard earth-fault monitoring and main propulsion safety shutdowns.
• Statutory Safety Equipment (Form E) & Safety Radio (Form R): Where the classification society acts as the Recognised Organisation for Safety Equipment, the surveyor checks annual shore service certificates for inflatable liferafts, hydrostatic release units (HRUs), EPIRB SOLAS IV/15.9 shore-based maintenance, VDR APT (SOLAS V/18.8), fixed CO₂ / foam / water-mist systems, portable extinguishers, SCBA air quality and 5-year hydro-tests, and witnesses lifeboat/rescue-boat engine starts and fire-pump pressure at two hydrants simultaneously.

Major open and national registries — including Liberia (LISCR), the Marshall Islands (RMI), Panama (AMP), Malta (Transport Malta), Singapore (MPA), the Bahamas (BMA), Hong Kong (MD), the UK (MCA), India (DG Shipping) and the United States (USCG) — require periodic flag-state safety inspections so the administration can verify operational compliance directly:

• Crew STCW certificates & flag endorsements (CRA / CoE): Every officer listed on the Minimum Safe Manning Document must hold a valid national Certificate of Competency plus a flag-state endorsement (or an unexpired Certificate of Receipt of Application, CRA, within the 3-month STCW Regulation I/10 window). Ratings must hold valid STCW Regulation II/4, III/4, II/5, III/5 or VI/1 certificates and medical certificates (valid up to 2 years, or 1 year under age 18).
• MLC 2006 working and living conditions: Individual Seafarers’ Employment Agreements (SEAs) signed by both parties, monthly wage allotment slips, hours of rest / work records matching bridge and engine-room logbook watch handovers (10 hours in any 24-hour period and 77 hours in any 7-day period), weekly Master’s accommodation and galley inspection logs, potable water microbiological test reports and hospital/medicine-chest inventory per the flag’s medical scale.
• Operational drills & enclosed-space safety: Flag inspectors routinely witness an abandon-ship, fire or enclosed-space entry drill (SOLAS Regulation III/19). Following recent flag safety advisories (such as RMI Marine Safety Advisory 12-26 on multi-gas detector bump testing and IMO MSC.1/Circ.1578/Rev.1 on lifeboat lowering safety), inspectors verify that portable 4-gas detectors (O₂, H₂S, CO, LEL) have in-date calibration and span-gas bottles onboard, and that lifeboat release hooks and simulated free-fall restraining devices are properly rigged.
• Navigation, GMDSS & environmental record books: Up-to-date ENCs and Electronic Nautical Publications (IMO MSC.1/Circ.1705), GNSS-denied navigation contingency procedures (UK MGN 719), LRIT Conformance Test Report matching the ship’s current MMSI and flag (detainable under IMO Res. A.1206(34)), and page-by-page reconciliation of the Oil Record Book Part I/II, Garbage Record Book Part I/II, Ballast Water Record Book and ECA fuel changeover logbook.

When you add a Flag-state inspection or Class survey in My inspections, SeaReady builds a vessel-specific preparation pack from the ship’s flag, classification society and ship type in Settings:

• All 9 IACS classification societies (scored partial preparation packs across all 14 ship types): DNV (Part 7 Chapter 1 Fleet in Service), Lloyd’s Register (LR) (Part 1 Chapter 2 & 3), ABS (Part 7 Survey After Construction), Bureau Veritas (BV) (NR467 Part A), ClassNK (Rules Part B), RINA (Rules Part A), China Classification Society (CCS) (Rules Part 1), Korean Register (KR) (Rules Part 1 Ch 2) and IRClass / Indian Register of Shipping (IRS) (Rules Part 1 Ch 2).
• Flag-state inspection packs & authority notes: Scored partial packs for Liberia (LR) (RLM-107 / RLM-300 ASI), the Marshall Islands (MH) (MI-108 / MN-2-011-16 ASI and MI-103 Yacht Code), Malta (MT) (FSI & CYC 2025), the United Kingdom (GB) (MCA REG Yacht Code Part A) and the United States (US) (domestic USCG Subchapters M, T, K, H, I, D, L and O), plus source-verified authority notes and statutory baseline modules for Panama (PA), Singapore (SG), the Bahamas (BS), Hong Kong (HK) and India (IN).
• Step-by-step preparation on board: Confirm the ship’s flag, classification society and certified ship type in Settings → Vessel & crew, add the visit in My inspections, enter the survey reference / notice number and due date, and walk the listed checks by zone or section while attaching dated photos and raising any defects in the Findings tracker.