Question 1

Your vessel is the first to respond to a MAYDAY from a sailing vessel in distress 8nm away. MRCC Halifax has designated your vessel as On-Scene Commander (OSC). What does this mean and how do you fulfil the role?

Accepted Answer

ON-SCENE COMMANDER (OSC) role: (1) IAMSAR MANUAL Volume III (Mobile Facilities): the IAMSAR manual governs SAR operations at sea; a vessel designated OSC by the RCC (Rescue Coordination Centre) takes tactical control of the search and rescue operation at the scene while RCC retains overall SAR coordination authority; (2) OSC RESPONSIBILITIES: (a) Proceed to scene and assess the distress situation; (b) Establish VHF communication with all assisting vessels and aircraft; (c) Coordinate the search pattern (if the vessel is not found immediately); (d) Coordinate rescue (approach, recovery of survivors); (e) Report regularly to RCC Halifax with: number of survivors found, condition, weather on scene, nature of the vessel in distress; (f) Direct assisting vessels to their assigned roles; (3) APPROACH TO DISTRESSED VESSEL: approach from leeward; deploy rescue boat if sea state permits; throw heaving lines; (4) LIFERAFT/SURVIVOR RECOVERY: prepare scramble nets, rope ladders; have medical team on standby; record names of all survivors; (5) DISTRESS VESSEL STATUS: if abandonment is occurring — note position of liferafts; search pattern for persons in water; (6) DEBRIEF TO RCC: on completion, provide full OSC report — persons recovered, description of vessel, last known position. SAR coordination knowledge is explicitly tested at Chief Mate level (MIN 653 S4). The IAMSAR Manual (International Aeronautical and Maritime Search and Rescue) is the authoritative SAR reference. It is a three-volume set: Volume I (Organisation and Management), Volume II (Mission Coordination — for RCC/MRCC use), Volume III (Mobile Facilities — for ships and aircraft at the scene). SOLAS V/33 (duty to render assistance): the master is obliged to render assistance to persons in distress at sea. The OSC role: the RCC appoints an OSC from among responding vessels when multiple resources are involved — usually the most capable or most experienced vessel. The OSC provides tactical control but does not override the RCC's authority to coordinate overall strategy. Option C (decline) is particularly wrong: SOLAS V/33 creates a legal obligation to assist — the master cannot decline based on commercial considerations. The ISM Code also requires vessels to have procedures for response to distress at sea. OSC and multiple vessel coordination: the OSC assigns search areas to each assisting vessel, coordinates the VHF channels in use, and maintains a situational picture to avoid vessels duplicating search areas or leaving areas uncovered.

Question 2

A fire alarm activates from the engine room at 0300. You are the Chief Officer and first officer on scene. The master is on the bridge. Describe your management of the emergency.

Accepted Answer

ENGINE ROOM FIRE — Chief Officer management: (1) TAKE COMMAND of the fire response — as Chief Officer (typically Fire Commander in the SMS muster plan), you assume command of the fire-fighting team while the master commands the vessel from the bridge; (2) IMMEDIATE ASSESSMENT: confirm with engineering watch whether the fire is in the engine room proper — is there smoke/heat at the engine room access? Do NOT open the access door if fire is suspected — this admits oxygen; (3) STOP VENTILATION: order the bridge to shut the engine room ventilation remotely — starve the fire of air; close fire dampers; (4) MUSTER: ensure fire party is mustered with BA (breathing apparatus) sets donned and tested; boundary cooling team ready with hoses at engine room boundaries; (5) CO2/FIXED SYSTEM: if the fire cannot be controlled quickly, prepare to activate the CO2 fixed firefighting system — this requires: (a) engineer confirms all personnel are evacuated from the engine room; (b) master's authority to activate; (c) PA announcement: "All persons stand clear of Engine Room, CO2 release imminent"; (d) activate from the CO2 cabinet (outside the engine room); (6) BOUNDARY COOLING: maintain water spray on all bulkheads adjacent to the engine room — prevent fire spread to accommodation and other spaces; (7) COMMUNICATIONS: regular sitrep to master every 5 minutes; (8) ABANDON SHIP READINESS: if CO2 fails or fire spreads — initiate abandon ship preparation. Engine room fire management at Chief Mate level requires knowledge of fixed firefighting systems, ventilation control, and command coordination. The CO2 fixed system: SOLAS II-2 requires CO2 (or equivalent) total flooding systems in engine rooms. CO2 displaces oxygen, suppressing the fire. Critical safety requirement: the engine room MUST be evacuated before CO2 release — CO2 at concentrations sufficient to extinguish fires (>30% volume) is immediately incapacitating and fatal. The two-person rule for CO2 activation in some SMS systems prevents accidental activation. The boundary cooling principle: even if the engine room fire is controlled by CO2, the surrounding bulkheads may be at high temperature. Uncontrolled heat transfer through the bulkhead to adjacent spaces (accommodation, cargo holds) can start secondary fires. Boundary cooling using hoses and monitors is maintained until all surfaces have cooled to ambient temperature. SOLAS II-2 fire detection: the fixed fire detection and alarm system must give warning of fire — the Chief Officer must ensure the alarm system is fully operational and that the alarm source (engine room section) is correctly identified.

Question 3

A fire breaks out in a crew cabin on C-deck at 0200. Smoke is spreading through the accommodation corridor. As Chief Officer, how do you manage this?

Accepted Answer

ACCOMMODATION FIRE management: (1) CONFIRM MUSTER: first priority — account for all crew; check the muster roll; if any person is unaccounted for, treat as missing until confirmed evacuated or rescued (do NOT assume they evacuated); (2) ISOLATE THE FIRE: shut all accommodation ventilation immediately; close all cabin doors in the affected section — closed doors significantly delay fire spread (a standard cabin door can hold fire for 30-60 minutes); (3) ATTACK THE FIRE: send BA team in pairs (minimum two persons) to the cabin of origin; carry charged hose lines; do not enter without BA — smoke contains CO, HCN, and other toxic gases regardless of whether visible flames are present; (4) SEARCH AND RESCUE: if any person is unaccounted for and may be in the fire area — BA team conducts a search; confirm all adjacent cabins are empty; (5) CLOSE VENTILATION DUCTS: identify and close the HVAC dampers for C-deck; (6) ELECTRICAL ISOLATION: consider isolating electrical supplies to the affected section — fire may be electrical in origin and live wiring in a flooded space is lethal; (7) SITREP to MASTER every 5 minutes; (8) PA SYSTEM: broadcast calm instructions to crew — direct them to muster stations if not already there; (9) BOUNDARY COOLING: above and below C-deck — prevent vertical spread through the deck structure. Accommodation fires are statistically the most common fire type at sea. The "closed door" life-safety principle: fire research consistently shows that a closed door dramatically slows fire spread. The corridor door of a burning cabin can hold back the fire for 30+ minutes. Instructing crew to close their cabin doors and stay inside if evacuation through smoke-filled corridors is impossible is SOLAS and IMO training doctrine. BA (Breathing Apparatus): SOLAS II-2/10 requires BA sets for all fire parties. The minimum is two complete BA sets plus one spare cylinder per set — in practice most vessels carry 6-8+ BA sets. The key rule: no one enters a smoke-filled space without BA. Smoke incapacitation: CO (carbon monoxide) at 200 ppm causes headache within 2-3 hours; at 6,000 ppm causes rapid incapacitation and death. Modern synthetic materials (cabin furniture, carpeting, bedding) produce HCN (hydrogen cyanide) when they burn — even more rapidly lethal than CO. The Fire Commander (Chief Officer) must resist pressure to send crew in without BA "just to have a look" — this is invariably fatal. MAIB casualty reports consistently identify inadequate BA use as a causation factor in firefighting fatalities.