Question 1

You are Master of a 35,000 GT bulk carrier in the North Atlantic in a Force 11 storm. The vessel is experiencing heavy slamming and two deck crew have been injured. Speed has been reduced to 5 knots. Charterer is demanding continued passage. What is your command decision?

Accepted Answer

COMMAND DECISION — FORCE 11 HEAVY WEATHER: SOLAS V/34 and ISM Code Section 5.3 give the master OVERRIDING AUTHORITY on safety decisions. The charterer cannot override this. ASSESSMENT: (1) STRUCTURAL INTEGRITY: at 35,000 GT bulk carrier in Force 11 — slamming at 5 knots indicates the vessel is taking green water over the bow. Slamming causes cumulative structural fatigue and can cause hatch cover failure — potentially fatal for a bulk carrier. Inspect hatch covers and deck plating; (2) CREW SAFETY: two crew injured — this is already a safety failure. Continuing in Force 11 with injuries risks further crew harm. The master must cease activities that are causing injury; (3) CARGO INTEGRITY: bulk cargo shift risk in extreme rolling. Check cargo for signs of movement or liquefaction; (4) STABILITY: check the stability situation — in heavy weather, free surface effects from ballast movement and deck water may affect GM; COMMAND OPTIONS: (a) HEAVE-TO: turn the vessel into the sea (head-to-sea or bow slightly off) and reduce speed to minimum steerage. This dramatically reduces slamming and deck cargo stress. The vessel makes minimal progress but safety is maximised; (b) RUN WITH THE SEA: in some sea states, running before the sea at controlled speed reduces slamming but risks broaching; (c) SEEK PORT OF REFUGE: assess the nearest available port of refuge and request entry. The port of refuge decision involves: vessel structural condition; crew condition; weather forecast (will it moderate?); port availability and shelter quality; (4) COMMUNICATION: inform the charterer in writing. State the safety grounds under ISM Section 5.3. Document everything. The charterer's commercial demands do not override the master's safety authority. The command decision in heavy weather is one of the most important tests of professional judgment. It is not binary (proceed vs stop) — it requires a continuous, dynamic assessment. The key factors: (1) structural condition of the vessel; (2) crew safety and welfare; (3) cargo condition; (4) weather forecast; (5) proximity to shelter; (6) vessel's sea-keeping characteristics. Charterer authority (option B): the charterer has NO authority over safety decisions. This is stated explicitly in ISM Section 5.3 and backed by SOLAS V/34. A master who proceeds in conditions causing structural damage and crew injury at the charterer's insistence has abandoned their STCW and ISM responsibilities. The forced heave-to (option C): not necessarily the right decision either. A well-found vessel with experienced crew in open sea may be able to make headway in Force 11. The decision depends on: (a) the vessel's actual condition; (b) the forecast trend; (c) whether heaving-to creates its own hazards (proximity to lee shore, traffic). MAYDAY (option D): Force 11 + slamming + two injuries is NOT automatically a MAYDAY situation. The vessel is navigating and not in immediate danger of sinking. A MAYDAY is appropriate only when the vessel is in imminent danger of sinking or a life is in immediate danger. The correct communication is: UKMTO/MRCC notification if seeking assistance; the passage/condition report to company; MAYDAY only if the situation genuinely becomes life-threatening. Documentation of the command decision: write every assessment, every communication with the charterer, and every action taken in the log. If a formal inquiry follows — this documentation demonstrates the master's professional decision-making.

Question 2

After 36 hours in Force 10-11 conditions, your vessel has shifted cargo and developed a 7° permanent list to starboard. You are 200nm from the Azores. What is your port of refuge decision process?

Accepted Answer

PORT OF REFUGE DECISION — MASTER: A 7° permanent list indicates the centre of gravity has shifted — either cargo movement or flooding. This is a SERIOUS STABILITY SITUATION requiring immediate port of refuge consideration. DECISION PROCESS: (1) ASSESS THE CAUSE: is the list from: (a) Cargo shift (if so — is it getting worse? Can it shift further in continuing heavy weather?); (b) Flooding (is water making its way in?); (c) Free surface from shifted ballast or tank changes? (2) ASSESS THE TREND: is the list stable at 7° or worsening? A stable 7° list may be survivable in moderate conditions. A worsening list in Force 10-11 may lead to capsize; (3) STABILITY CALCULATION: run the loadicator with the assumed shifted cargo weight and position. What is the current effective GM? What is the righting arm (GZ) at current heel? Does the vessel have adequate stability reserve?; (4) WEATHER FORECAST: will the storm moderate within 6-12 hours? If yes — can the vessel safely ride it out? If no or uncertain — proceed to port of refuge; (5) ASSESS THE REFUGE PORT: (a) Can the Azores (Horta, Terceira) receive a vessel with 7° list in the current sea state? (b) Is there adequate shelter in the port? (c) Can cargo be restowed there? (d) Is a tug available for assistance if manoeuvring is compromised by the list?; (6) DECLARATION TO COASTAL STATE: contact the Portuguese maritime authority (MRCC Delgada) — request port of refuge entry. Provide vessel condition, stability status, list, cargo shift; (7) PAN PAN: in a vessel with compromised stability, transmit a PAN PAN (urgency) signal. This alerts maritime authorities without the formality of MAYDAY. 7° list from cargo shift: this is a serious situation requiring IMMEDIATE action — but not necessarily abandon ship. The master's response must be measured and analytical. At 7° list, the vessel's GZ curve has been shifted. The question is: what is the residual stability reserve? A vessel with 1.5m GM shifted to 7° may have adequate reserve. A vessel with 0.3m GM shifted to 7° is dangerously close to capsizing. The loadicator gives this answer. The worsening trend: if the list is worsening (was 3°, now 7°, still rolling heavily) — immediate port of refuge is required. The cargo will continue to shift in heavy weather until equilibrium at the new angle or until the vessel capsizes. 7° being "manageable" (option B): depends entirely on the stability reserve. This is not a generic answer — it requires calculation. Oral examiners want to see that the master uses the loadicator and makes a data-driven decision, not a "seems OK" assessment. Abandon ship (option C): premature. A 7° list in heavy weather is dangerous but not necessarily a capsizing situation. Abandoning ship in Force 10-11 seas is enormously dangerous — survival craft in these conditions have capsized. The master does not abandon the vessel unless the remaining-on-board option is worse than abandonment. Counter-ballasting (option D): this addresses the list symptom but not the cause. If the cargo has shifted — adding starboard ballast may correct the list angle but it adds weight and reduces freeboard. In continuing heavy weather, the cargo may shift further, making the next correction impossible. The longer-term solution is port of refuge and cargo restowage.

Question 3

During a 5-day Force 10 passage, your bridge team is showing severe signs of fatigue. The ship is in the North Atlantic in December. How do you maintain safe operations without compromising crew health?

Accepted Answer

EXTREME WEATHER CREW MANAGEMENT — MASTER: Extended heavy weather creates compounding fatigue through: disrupted rest due to ship motion; increased workload (more deck inspections, equipment monitoring, stability checks); heightened vigilance requirement; stress. MASTER'S MANAGEMENT STRATEGY: (1) REDUCE SPEED: in extreme conditions, reducing speed to minimum steerage reduces: slamming (which causes noise and vibration preventing sleep); crew risk in accessing deck areas; structural stress. Inform the charterer in writing of the speed reduction and reason; (2) EXTEND WATCHES IN HEAVY WEATHER: some companies authorise 4-on/8-off (rather than 4-on/8-off in watches) or move to a 3-watch system to distribute load. BUT STCW rest hours still apply — this requires careful scheduling; (3) MASTER'S WATCH: the master may take an extended watch (or be on call standby) allowing OOW and helmsmen to get maximum rest; (4) LIMITED DECK ACCESS: restrict all non-essential deck operations. Brief the bosun — no deck work in dangerous conditions. This reduces crew stress and injury risk; (5) HOT FOOD AND DRINKS: maintaining adequate hot food provision in heavy weather is a significant morale and physical wellbeing factor. MLC Standard A3.2; (6) ISM EXCEPTION: STCW allows an exception to rest hours for genuine safety emergencies. But this exception is: time-limited (addressed as soon as the emergency permits); documented (log entry of the hours worked and the reason); reported to the DPA; (7) SEEK SHELTER: if crew fatigue is reaching a critical point — the master must consider seeking shelter or modifying the passage to allow rest periods; (8) PSYCHOLOGICAL CHECK: check in individually with each watchkeeper daily in heavy weather conditions. The fatigue-safety spiral: in heavy weather, fatigue increases risk, which requires more vigilance, which increases fatigue. The master must break this cycle by reducing the operational demand through speed reduction and operational restrictions. STCW exceptions to rest hours: Code A-VIII/1 Para 9: "The master shall have the right to suspend the rest period requirements and require a seafarer to perform any necessary duties during an emergency affecting the safety of the ship, persons on board or the cargo, or for the purpose of giving assistance to other ships or persons in distress." This applies in genuine emergencies. But "heavy weather passage" per se is not an emergency — it is foreseeable. Pre-planned adaptation (speed reduction, watch redistribution) is better than invoking the exception. Single officer on bridge (option D): SOLAS and STCW explicitly require: "at all times a proper watch shall be maintained" (STCW A-VIII/2). A "proper watch" on a large vessel in Force 10 conditions typically requires the officer of the watch, a helmsman, and ideally a lookout. Reducing to a single person increases risk dramatically. The coffee solution (option B): caffeine is a temporary alertness aid but does not substitute for sleep. Sleep deprivation impairs judgment in ways that the impaired person cannot self-assess. A fatigued officer who has "had a coffee" may feel alert but have the reaction time and judgment of a sleep-deprived state. Reducing voyage speed: many modern charter parties include weather clause provisions. If the master genuinely reduces speed for safety in heavy weather (and documents it properly) — the vessel is not on-hire during the safety-required speed reduction period in some charter parties.