Your 2900 GT general cargo vessel is carrying 8 reefer units of frozen fish at −18°C from Iceland to Rotterdam. During the passage the power supply to Reefer No. 3 fails. As Chief Officer, what is your response?

A. REEFER CARGO FAILURE — Chief Officer response: (1) IMMEDIATE: restore power to Reefer No. 3 as a priority — check breaker, fuses, cable connection; call the electrician; (2) TEMPERATURE LOG: note the time of failure and record the unit's temperature reading at that moment; photograph if possible; (3) CARGO PROTECTION: if power cannot be restored quickly, assess time before cargo temperature rises above −18°C (frozen goods typically have a tolerance of 1-2°C before quality is compromised; the time depends on the cargo's own thermal mass); (4) ALTERNATIVE POWER/STORAGE: if the vessel has another reefer position available, consider moving cargo; or borrow power from an adjacent position; (5) NOTIFY SHIPPER/CONSIGNEE: contact the company; the company notifies the reefer cargo insurer and consignee of the failure and the steps taken; (6) CARGO LOG ENTRY: detailed entry of fault, time, temperature, corrective action and outcome; (7) PROTEST: if cargo quality is compromised despite best efforts, note a Sea Protest at Rotterdam on arrival citing the equipment failure; (8) SURVEY ON ARRIVAL: request a joint survey with P&I Club correspondent and consignee — document the temperature at delivery; (9) BILL OF LADING NOTE: if cargo is to be delivered in a compromised state, note this on the delivery documents.

B. Frozen fish at −18°C will remain safe for at least 7 days without power at sea temperatures. Continue to Rotterdam without action and report the failure on arrival.

C. A reefer failure is an equipment issue — refer to the vessel's electrician only. The Chief Officer has no responsibility for reefer cargo monitoring.

D. If the reefer fails, discharge the cargo immediately at the nearest port. The Hague-Visby Rules require immediate discharge of temperature-sensitive cargo on any equipment failure.

A. 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.

B. Dangerous goods documents are the shipping agent's responsibility. As Chief Officer, accept the cargo once the agent confirms the DGD is complete and store it anywhere convenient.

C. Class 2.3 toxic gas can be stowed adjacent to Class 8 corrosives provided they are in separate compartments on the same deck. No minimum distance is required below deck.

D. Dangerous goods on vessels under 3000 GT are exempt from IMDG Code requirements. The IMDG Code only applies to vessels of 3000 GT and above.

A. 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.

B. A moisture content of 24% is below 100% so the cargo cannot liquefy. Load the cargo and complete voyage normally.

C. Conduct your own can test on a sample of the cargo. If the sample does not flow in the can, the cargo is safe to load regardless of the moisture content certificate.

D. Liquefaction only applies to iron ore fines — nickel ore fines are a solid mineral cargo and are not subject to IMSBC moisture limits.