Question 1

Your 2800 GT bulk carrier is about to load grain in a UK port. What pre-loading inspections and certifications are required?

Accepted Answer

PRE-LOADING REQUIREMENTS for grain cargo: (1) GRAIN LOADING DOCUMENT: SOLAS VI/9 — vessels must carry a Document of Authorization (International Grain Certificate) or have specific approval for the intended grain loading. Alternatively, they must comply with the IMO International Grain Code (Grain Rules) for stability calculations showing the vessel can withstand grain shift; (2) STABILITY CALCULATION: the Grain Code requires that the vessel, when loaded, can demonstrate: maximum angle of heel due to grain shift does not exceed 12°; residual area in the GZ curve (between the heeling arm curve and GZ curve) is not less than 0.075 m-rad; GM after correction for grain shift is not less than 0.30m (or as specified by Administration); (3) HOLD CLEANING: grain cargo requires GRAIN-CLEAN holds — inspect for: residues of previous cargo; pests (grain weevils); fumigant residue; moisture/condensation; oil staining (from bilge seepage); (4) NCA INSPECTION: in the UK, the National Cargo Authority (NCA) or an approved grain inspector may inspect holds before issuing a grain loading certificate; (5) FUMIGATION CERTIFICATION: if holds have been fumigated, appropriate clearance certificates and fumigation records must be in order and crew must be briefed on re-entry safety; (6) DUNNAGE: ensure adequate dunnage is available if required for the specific grain cargo. Grain cargo has specific SOLAS requirements because it is particularly prone to cargo shift. When a ship rolls, dry grain can flow — and a major grain shift can cause rapid capsizing. The SOLAS International Grain Code (Chapter VI Part C, and the International Grain Rules adopted by IMO) applies to ALL vessels carrying bulk grain, not just those over a size threshold. The Document of Authorization: issued by the flag state or Classification Society confirming the vessel has the required grain loading stability documents. Without this, a vessel cannot load grain in a SOLAS port. Grain stability criteria: the 12° maximum angle from grain shift, the 0.075 m-rad residual area, and the 0.30m minimum GM after shifting are the three criteria that must be satisfied. These are ADDITIONAL to the standard IS Code stability criteria. Hold cleanliness: grain loading authorities worldwide inspect holds before loading. Grain is a food commodity — contamination from previous cargo residue, pests, or mold can render an entire cargo unsaleable. Hold cleanliness certificates are issued by cargo inspectors and presented to the grain terminal before loading commences. A failed hold inspection can result in the vessel being required to re-clean (at significant cost and delay) or in refusal to load. Previous hazardous cargo: holds that previously carried chemicals, fertilisers, or dangerous goods must be gas-free and certified clean before grain loading — specific minimum standards apply (from the NCA or equivalent).

Question 2

As Chief Officer on a 2800 GT general cargo vessel you are presented with a Dangerous Goods Declaration for 4 drums of Class 8 corrosive liquid and 2 cylinders of Class 2.3 toxic gas. What are your key responsibilities before loading?

Accepted Answer

CHIEF OFFICER responsibilities for IMDG dangerous goods before loading: (1) VERIFY DOCUMENTS: check that each dangerous good has a compliant Dangerous Goods Declaration (DGD) from the shipper — must include: UN number, proper shipping name, class, packing group, total quantity/mass, any special provisions; (2) CHECK IMDG CODE: verify segregation requirements between Class 8 corrosive and Class 2.3 toxic gas — IMDG Segregation Table: Class 2.3 and Class 8 require "2 — Away From" (minimum 3m separation or by a complete compartment or hold in ships). If stowing both in the same vessel, ensure this segregation can be achieved; (3) CHECK STOWAGE CATEGORY: (a) Class 8 liquids (corrosive) — typically Category B (under deck away from living quarters, on deck or under deck); (b) Class 2.3 toxic gas — Category D (on deck only) in most cases; (4) VERIFY PACKAGE INTEGRITY: inspect drums and cylinders for leaks, correct labelling (class diamond labels, orientation arrows for liquids), UN specification packaging; (5) EMERGENCY SCHEDULES: locate relevant IMDG Schedule (EmS) for firefighting and first aid; ensure MFAG and EmS summary is accessible; (6) CARGO PLAN: mark dangerous goods positions on the cargo plan with UN numbers and classes; (7) MASTER'S APPROVAL: present the dangerous goods information to the master for approval before loading. IMDG Code (International Maritime Dangerous Goods Code) — mandatory under SOLAS VII/1 for vessels carrying packaged dangerous goods. The code applies to ALL vessels carrying dangerous goods including small vessels. Chief Officer role: on most vessels, the Chief Officer (as cargo officer) is responsible for planning and supervising dangerous goods loading. Segregation: the IMDG Code Segregation Table specifies the required separation between different hazard classes. Class 2.3 (toxic gas) and Class 8 (corrosive) require "2 — Away From" — which in practice means they must not be in the same hold or compartment and must be separated by at least 3m or a complete structural division. Class 2.3 stowage category D (on deck only): toxic gases may release if containers are damaged — "on deck only" ensures they are in a ventilated area and accessible for firefighting and emergency response. If a fire occurs in the hold where toxic gas cylinders are stowed under deck, firefighting becomes extremely hazardous. DGD (Dangerous Goods Declaration): the shipper is responsible for the accuracy of the DGD. The carrier (ship) cannot verify the contents of sealed packages — but they must ensure the documentation is complete and that the declared goods comply with IMDG stowage and segregation requirements before acceptance. EmS (Emergency Schedules): the IMDG Code Volume 2 contains EmS guides for each UN number — what fire suppressant to use, first aid measures, and initial emergency actions. These must be accessible to the bridge team.

Question 3

You are Chief Officer accepting a cargo of nickel ore fines from Indonesia. The shipper's declaration states the moisture content is 24%. You have concerns. What do you do?

Accepted Answer

IMSBC Code Group A cargo — liquefaction risk assessment: (1) CLASSIFY: nickel ore fines is an IMSBC Code Group A cargo — cargoes that may liquefy. The IMSBC Code requires that Group A cargoes must only be loaded if the moisture content is less than the Transportable Moisture Limit (TML); (2) TML: the IMSBC Schedule for nickel ore fines gives typical TML in the range 30-35%, but the ACTUAL TML depends on the specific sample from the specific shipment — it must be determined by shipper-arranged testing using IMSBC-approved test methods (Proctor/Fagerberg for ores); (3) ACTUAL MOISTURE CHECK: the shipper MUST provide a certificate of moisture content AND a TML certificate for the specific cargo. If the declared moisture is 24% and TML is, say, 30%: the cargo is within the limit and can be loaded. BUT — if the actual TML of this specific ore is, say, 22%, then 24% moisture EXCEEDS the TML; (4) CHIEF OFFICER'S DUTY: (a) Verify both moisture content certificate AND TML certificate are from a competent authority using IMSBC-approved methods; (b) Calculate the Flow Moisture Point — 90% FMP = TML; (c) If moisture exceeds TML or documentation is inadequate: REFUSE THE CARGO and notify the master; (d) A can test (penetration test) provides a quick shipside check but is NOT a substitute for the certificate; (5) WET WEATHER: do not load during rain — wet conditions increase surface moisture beyond the certificate value. Bulk cargo liquefaction has been responsible for numerous catastrophic bulk carrier losses with total crew loss. The IMSBC Code (International Maritime Solid Bulk Cargoes Code) is mandatory under SOLAS VI/2. Liquefaction mechanism: granular materials with high moisture content can liquefy under vibration (from vessel motion and sea conditions). When liquefied, the cargo flows to one side — a mass shift that can cause rapid capsizing. The Transportable Moisture Limit (TML): defined in IMSBC Code as 90% of the Flow Moisture Point (FMP). The FMP is the moisture content at which the material begins to behave as a liquid under dynamic loads. Group A cargoes must not be loaded with a moisture content exceeding the TML. Verification requirements: the IMSBC Code requires the shipper to provide: (a) a certificate of the moisture content of the cargo; (b) a certificate of the TML. Both must be dated within 7 days of loading and represent the actual shipment. Famous casualties: the Emerald Star (2013), the Harita Bauxite (2015), and earlier losses of vessels in the Philippines/Indonesia trade routes carrying nickel ore fines — many with total loss of crew. MCA Circular: the MCA and ICS have issued multiple circulars warning of the danger of nickel ore fines from Indonesian and Filipino ports, where documentation fraud has been detected. The can test: IMSBC Code allows a simple shipside test as an additional indicator but it cannot replace proper moisture content testing. A negative can test does not guarantee safety.