Question 1

During discharge of general cargo in Rotterdam after a 7-day passage from the Canaries, the consignee's surveyor identifies moisture damage to cardboard cartons of canned goods. As Chief Officer, how do you respond?

Accepted Answer

CARGO MOISTURE/CONDENSATION DAMAGE — Chief Officer response: (1) TALLY AND SURVEY: before the consignee removes cargo, conduct a joint survey with the P&I correspondent (appointed by the P&I Club) and the shipper's/consignee's surveyor — document the damage jointly: which packages are affected, nature of damage, apparent cause; (2) CARGO LOG: produce copies of the cargo log entries showing vent settings, hold temperature records (if kept), any weather events during the passage; (3) TYPES OF CONDENSATION: Cargo Sweat — moisture condensing on CARGO from the ship's air. Occurs when warm cargo (loaded in a warm port) is carried to a cold area and the dew point of the air in the hold exceeds the cargo surface temperature. Canned goods from the Canaries arriving in Rotterdam in winter: the cargo is warm; Rotterdam air is cold — cargo sweat risk is high; SHIP SWEAT — moisture condensing on the SHIP's structure (deckheads, frames) and then dripping onto cargo. Occurs when moist warm sea air enters the hold and the ship's steel surfaces are colder; (4) VENTILATION RECORDS: during the voyage, the OOW should have applied the ventilation rule: ventilate if the dew point of outside air is BELOW the dew point of the hold air. Cold outside air is typically drier — so ventilating into cold conditions removes moisture from the hold. If this was not done correctly, the Chief Officer must identify this from the log; (5) NOTE PROTEST: if not already noted, note a Sea Protest regarding the voyage conditions. Cargo condensation damage is a frequent source of cargo claims, particularly on passages involving significant temperature or humidity changes. The Canaries to Rotterdam passage is a textbook condensation risk: warm, humid cargo (loaded at 22°C with high humidity) transported to cold Rotterdam (5°C) in winter creates exactly the conditions for cargo sweat. Hague-Visby Rules Article IV Rule 2: the carrier is not liable for losses arising from "(m) wastage in bulk or weight or any other loss or damage arising from inherent defect, quality or vice of the goods" or "(n) insufficiency of packing." However, condensation damage from poor ventilation management is NOT covered by these exceptions — it is a failure to properly care for the cargo (Article III Rule 2: "the carrier shall properly and carefully load, handle, stow, carry, keep, care for, and discharge the goods carried"). Ventilation rule: the classic rule is "three degrees cooler — do not ventilate" (if outside air dew point is less than 3°C below hold air dew point — ventilate; if outside is only marginally cooler or warmer, do not ventilate). The basis is to prevent introducing moist air. In practice, modern vessels with dew point monitoring have much more precise guidance. P&I Club notification: ALWAYS notify the P&I Club when cargo damage is discovered — the Club appoints correspondents to protect the carrier's interests and ensure proper surveys. Never engage with cargo claims without P&I involvement.

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.