Your vessel has a fixed smoke detection system. As master, an examiner asks whether a dedicated fire patrol is still required and what the master's obligations are under SOLAS in maintaining fire safety watchkeeping.

A. FIRE PATROL — SOLAS REQUIREMENTS AND MASTER'S OBLIGATIONS: SOLAS II-2 REGULATION 7 AND 14: A fixed fire detection and alarm system does NOT automatically replace the requirement for a fire patrol — it depends on the vessel type and the system's coverage. FOR VESSELS WITH CONTINUOUSLY MANNED SPACES: (1) The fixed detection system may satisfy the watch requirement if it provides full coverage of all spaces; (2) However, cargo spaces and holds may not be continuously monitored by detection systems — periodic patrol required; (3) MACHINERY SPACES IN UMS: special fire patrol requirements apply — smoke detectors, bilge alarms, and agreed inspection intervals with flag state approval. MASTER's OBLIGATIONS FOR FIRE SAFETY WATCHKEEPING: (a) Ensure the fire detection system is tested regularly (SOLAS requires testing at each departure and after any system work); (b) Monitor fire control plan — it must be up to date and available to fire brigades in a weatherproof tube on the bridge and external deck; (c) ISM FIRE RISK ASSESSMENT: conduct periodic fire risk assessments under the SMS — identify new hazards, especially after cargo or voyage type changes; (d) SAFE RETURN TO PORT (SOLAS II-2 Reg 21 for passenger vessels — but fire safety principles apply to cargo vessels via SOLAS II-2 generally); (e) Ensure the fire safety log records all tests, drills, and any defects in fire detection or fixed systems.

B. A fixed smoke detection system fully replaces the fire patrol requirement. Once a certified fixed detection system is installed, manual patrols are not required under SOLAS.

C. Fire patrols are only required on passenger vessels. Cargo vessel fire safety is passive — detection systems and drills are sufficient and no manual patrol is mandated.

D. Fire patrol responsibilities belong solely to the duty officer of the watch. The master is only responsible for fire safety at drills and during actual emergencies.

A. ABANDON SHIP DECISION — COMMAND AUTHORITY AND FRAMEWORK: THE MASTER'S AUTHORITY: SOLAS Chapter III and the ISM Code place the abandon ship decision exclusively with the master. The company can advise but cannot override the master's decision on abandonment — SOLAS V/34.1 confirms the master's ultimate authority for safety. TIMING CONSIDERATIONS: abandon ship is a last resort — the following criteria support the decision: (1) Fire cannot be controlled or contained and is spreading; (2) The vessel's structural integrity is threatened (fire in hold = risk of structural steel softening); (3) The fire is approaching fuel tanks, cargo spaces or gas lines; (4) Crew casualties are occurring or the crew cannot fight the fire safely; (5) The vessel is listing or there are signs of progressive flooding; (6) MRCC has been informed and rescue assets are en route. DECISION PROCESS: (1) Assess the fire situation honestly — is containment possible? (2) Contact MRCC: transmit Mayday if not already done, give position, vessel size, crew number, nature of emergency; (3) Prepare lifeboats and liferafts — muster crew at stations (this is preparation, not abandonment); (4) Give the order only when the vessel is no longer safe to remain on board; (5) THE SIGNAL: 7 short blasts + 1 long blast on the ship's whistle and alarm system; (6) Confirm crew muster complete before ordering "abandon ship." The sequence: Mayday → muster → prepare boats → last-resort order.

B. Abandon ship as soon as the fire cannot be controlled in the first 10 minutes. Early evacuation is always safer than remaining on a burning vessel.

C. Contact the company DPA and wait for authorisation before ordering abandon ship. The master cannot make the abandon ship decision independently without company approval.

D. Order all crew to liferafts immediately and do not attempt to lower the lifeboats in a fire situation — lifeboat fuel tanks may ignite.

A. CO₂ TOTAL FLOODING — COMMAND DECISION PROCESS: WHY CARE IS REQUIRED: CO₂ at fire-extinguishing concentrations (34%+ in air) is instantly fatal to any person in the space. Premature or incorrect CO₂ release has killed crew members. The decision must be deliberate and methodical. DECISION PROCESS: (1) CONFIRM FIRE: (a) Is this a genuine fire or a detector fault/false alarm? Visual confirmation via CCTV or access port; (b) Smoke odour in adjoining spaces; (c) Temperature alarms; (2) CONFIRM SPACE IS EVACUATED: (a) Account for ALL persons who may be in the engine room — use the muster list; (b) Any engineer on watch must be accounted for; (c) Check all access points and adjoining spaces; (3) CLOSE AIR SUPPLY: shut all ventilation fans, air intakes, and dampers to the engine room — CO₂ is only effective in a sealed space; (4) STOP FUEL OIL SUPPLY to reduce fire fuel load; (5) SOUND CO₂ ALARM (typically a horn or klaxon in the space) for a mandatory warning period before release (SOLAS requirement); (6) CONFIRM RELEASE WITH CHIEF ENGINEER: the decision to release should be a coordinated command decision; (7) RELEASE CO₂: activate from the CO₂ release station; (8) DO NOT ENTER for minimum 30 minutes after release — CO₂ dissipates but atmosphere must be tested before re-entry.

B. Activate the CO₂ system immediately when the detector alarms — speed is critical and any delay risks fire spread. Pre-release checks slow down the response.

C. CO₂ systems activate automatically when the smoke detector reaches a threshold — manual activation by the master is not required and the master should monitor rather than intervene.

D. Use the portable CO₂ extinguishers first. The fixed CO₂ total flooding system should only be used as an absolute last resort when all other methods have failed.