You receive a cargo booking for 50 tonnes of fireworks (UN 0336, Division 1.4G) in containers. As Master, what must you verify before accepting this shipment?

A. CLASS 1 EXPLOSIVES — MASTER'S VERIFICATION CHECKLIST: UN 0336, DIVISION 1.4G: this is the "consumer fireworks" division — the lowest hazard Class 1 division. 1.4G indicates: limited explosion hazard; effects confined mainly to the package; no large fragmentation. However, Class 1 remains the most regulated IMDG class. WHAT THE MASTER MUST VERIFY: (1) COMPETENT AUTHORITY APPROVAL: IMDG Code Class 1 cargo requires COMPETENT AUTHORITY APPROVAL for both the country of origin and transit countries. Check that the shipper has obtained required approvals from: (a) country where cargo is manufactured; (b) flag state (MCA for UK-flagged vessels); (c) countries of transit and destination; (2) PACKING: Class 1 cargo must be in UN-approved packaging (P135/P136 for 1.4G). Verify UN type approval marks on packages; (3) SEGREGATION TABLE: IMDG Code Section 7.2 — Class 1 explosives have specific segregation requirements from other dangerous goods and prohibited categories. Check the segregation table; (4) STOWAGE — IMDG Code SPECIAL STOWAGE PROVISIONS: (a) Stow "away from" heat sources and ignition sources; (b) Cannot be stowed on deck under certain conditions; (c) Prohibition from certain vessels (e.g., passenger ships — Class 1 prohibited except 1.4S); (5) QUANTITY LIMITS: check if ship type and total Class 1 quantity triggers IMDG Code net explosive quantity (NEQ) limits; (6) DG MANIFEST: shipper must provide IMDG-compliant dangerous goods manifest and emergency contact; (7) VESSEL'S SMS AND DG POLICY: some company SMS policies restrict Class 1 carriage. Check company approval requirements.

B. Division 1.4G fireworks are consumer goods and not subject to the same IMDG requirements as military explosives. Accept the booking and treat them as general cargo.

C. Class 1 cargo is prohibited on all cargo vessels. Only naval vessels and licensed explosives carriers can transport Class 1 under international law.

D. Fireworks are a seasonal cargo. No special documentation is required beyond a general dangerous goods declaration from the shipper.

A. CONTAINER LOSS OVERBOARD — MASTER'S OBLIGATIONS AND INVESTIGATION FOCUS: IMMEDIATE ACTIONS: (1) SAFETY: no crew on deck in the current conditions. Head count — is anyone missing?; (2) MANOEUVRE: alter course to reduce vessel motion and prevent further casualties. Inform VTS if in TSS or coastal waters; (3) MAIB NOTIFICATION: lost containers and damage to vessel = significant marine incident. Call MAIB 023 8023 2527; (4) MARPOL: if containers contained goods that are now discharged into the sea — MARPOL reporting obligation (material that could pollute); (5) SOPEP/Emergency Response: if hazardous goods are in the lost containers — what is the UN number? IMDG EmS code? Coastal state environmental alert?; (6) LOG: immediate OLB entry — number of containers lost, position, time, sea state, course/speed; (7) NOTIFY: owner, DPA, P&I Club, charterer; (8) MARK ON CHART: position of lost containers. MAIB will want this. Container stranding is a major navigation hazard — notify MRCC/VTS for NAVTEX broadcast; INVESTIGATION FOCUS: (a) WAS THE CARGO SECURED IN ACCORDANCE WITH THE CSS CODE AND CARGO SECURING MANUAL (CSM)?: the CSS Code (Code of Safe Practice for Cargo Stowage and Securing) and vessel-specific CSM (approved under SOLAS VI/5.6) specify lashing requirements. Did the lashings meet specification? Were they correctly applied?; (b) WAS THE VESSEL'S STABILITY AND LOADING CONDITION APPROPRIATE?; (c) WAS THE WEATHER FORECAST CONSIDERED IN STOWAGE DECISIONS?; (d) WERE LASHINGS CHECKED EN ROUTE?; (e) MASTER'S SIGNATURE ON CARGO PLAN: did the master approve the stowage and securing plan?

B. Container losses at sea are covered by cargo insurance. Notify the charterer and continue the voyage — the containers are their problem once they fall overboard.

C. Container lashing is the chief officer's responsibility. The master is only accountable for navigational decisions and has no cargo securing liability.

D. Three containers overboard is a minor incident. Continue voyage and report at the next port. MAIB notification is only required for vessel damage.

A. IRON ORE FINES LOADING — TML AND MOISTURE ASSESSMENT: LIQUEFACTION RISK: iron ore fines are an IMSBC Code Group A cargo (may liquefy). Liquefaction is when cargo behaves like a liquid due to high moisture content exceeding the Transportable Moisture Limit (TML). Several bulk carriers have sunk due to liquefaction (e.g., Bulk Jupiter 2015, Vinalines Queen 2011). TML TESTING: the shipper must provide: (a) TML certificate (maximum 6 months old for iron ore fines); (b) Moisture content (MC) certificate showing actual MC is below TML. The margin: actual MC should be BELOW TML — the IMSBC Code requires actual MC < TML. A "can test" may be used as a pre-load indicator. RECENT RAINFALL — ADDITIONAL DUTY: if rainfall has occurred since the TML/MC certificate was issued, the moisture content of the surface cargo stockpile may have increased. THE MASTER'S DUTY: (1) REQUEST UPDATED MOISTURE CONTENT TEST: ask the shipper for a fresh moisture content test reflecting post-rainfall conditions. IMSBC Clause 4.4.2 allows the master to request additional testing if there is reason to believe moisture content has increased; (2) VISUAL INSPECTION: inspect the stockpile. Wet sheen on surface, water pooling, flowing consistency when disturbed — all indicators of elevated moisture; (3) CAN TEST: IMSBC Appendix 2 — can test procedure. Take a sample of the cargo into a tin can, seal it, shake vigorously. If free moisture appears or the cargo flows — it is too wet to load; (4) REFUSE TO LOAD IF UNCERTAIN: the master has the right (and duty) to refuse to load Group A cargo that may be unsafe. This is backed by ISM Code 5.3.

B. The shipper's TML certificate is valid. Once the certificate is presented, the master has no further obligation to assess moisture content.

C. Iron ore fines do not liquefy in transit — they are a solid mineral cargo. Moisture content testing is only required for agricultural cargoes such as grain.

D. Rainfall affects only the surface layer of stockpiled cargo. Load the cargo at reduced speed and the surface moisture will dissipate once in the hold.