14.3 Emergency Procedures: Blackout, Flooding, Abandon Ship & Engine Room Safety Drills

14.3 Emergency Procedures: Blackout, Flooding, Abandon Ship & Engine Room Safety Drills

A merchant vessel at sea operates as an isolated, self-sustaining industrial unit. When catastrophic emergencies strike—such as total electrical power failure, high-volume hull flooding, or an order to abandon ship—external help is hours or days away. General Purpose (GP) Ratings must execute drilled emergency duties with calm discipline, razor-sharp technical knowledge, and immediate precision.

1. Blackout Emergency Response & Emergency Generator Systems

A blackout is loss of the main electrical supply to the ship's distribution system. On a common 440 V installation this de-energizes the main switchboard; emergency or battery supplies remain separate.

                         BLACKOUT CASCADE
              Main electrical supply is lost
                              |
                  Main switchboard de-energized
                              |
        +---------------------+---------------------+
        |                     |                     |
  Propulsion auxiliaries  Steering power       Main lighting and
  may stop; engine may    may be lost           ventilation lost
  trip for protection
                              |
              Independent emergency supply operates
              Automatic-generator arrangement: <=45 s
              Batteries supply required immediate services

The Cascade Consequences of a Blackout

A blackout requires immediate coordinated action:

1. Propulsion: Electrically driven cooling, fuel and lubricating-oil pumps can stop. Loss of these essential services may trip the main engine to prevent damage.
2. Steering: Loss of hydraulic power units can remove normal steering until the approved alternative supply or arrangement is available.
3. Lighting: Normal lighting is lost. Emergency lighting supplies the required escape, machinery and control positions; use the available battery-backed lighting during the changeover.
4. Ventilation: Main electrically driven fans stop, reducing ventilation and allowing machinery-space temperatures to rise.

The Emergency Diesel Generator (EDG) Architecture

SOLAS II-1/42 covers passenger ships and II-1/43 cargo ships. The emergency source can be a generator or an accumulator battery. A common diesel-generator installation is illustrated below:

                 EXAMPLE EMERGENCY DIESEL INSTALLATION
             Above uppermost continuous deck; open-deck access

  Independent fuel supply ---> Diesel generator ---> Emergency switchboard
                                      |                       |
                 Independent cooling, commonly radiator        |
                                                              v
  Approved stored starting energy                 Required emergency loads
  Primary: commonly battery start                 - Emergency lighting
  Additional starting energy/manual means         - Navigation/communications
  as required; hydraulic or other approved        - Fire detection and alarms
  starters are possible                           - Specified pumps/steering

• Statutory Location: The emergency source and associated switchboards are above the uppermost continuous deck, readily accessible from the open deck and positioned so a casualty affecting the main machinery/electrical installation does not disable the emergency supply. This deck must not simply be equated with the bulkhead deck. They are normally aft of the collision bulkhead, as specified by the applicable rule.
• Independent Fuel and Cooling: A diesel installation needs its own fuel supply and cooling that remains available following failure of the main installation. A gravity day tank and engine-driven radiator are common examples. Learn the fitted arrangement. The standard required service periods are 18 hours on cargo ships and 36 hours on passenger ships, with specified services having their own durations.
• Starting Energy: An automatically started set needs stored energy for at least three consecutive starts, protected against critical depletion, and a second energy source for three further starts within 30 minutes unless effective manual starting is demonstrated. Approved electrical, hydraulic or pneumatic starting arrangements are possible; a non-electric second starter is not a universal requirement.
• Automatic Supply: In the common automatic-generator arrangement, the generator starts, connects and supplies the required load as quickly as safely practicable, within 45 seconds. Approved battery arrangements supply required immediate or transitional services.

Essential Emergency Switchboard Consumers

The emergency supply maintains specified safety services rather than every normal machinery load:

• Emergency lighting at escape routes, machinery/control positions, muster and embarkation stations.
• Required navigation lights, communications and navigation equipment.
• Fire detection, alarms and required emergency signals.
• Electrically dependent fire pumps, steering, watertight-door equipment and other services where required by the applicable arrangement.

The actual circuit list and approved instructions identify which services the ship's emergency source supplies.

Trainee GP Rating Duties During a Blackout

• Rule 1: Always Carry an Approved Intrinsically Safe Torch: Every GP Rating must carry an intrinsically safe, explosion-proof flashlight in their boiler suit pocket whenever entering the engine room. Relying on cellphone lights is strictly prohibited.
• Stay Calm and Freeze: When darkness hits, do not panic or sprint. Heavy machinery (flywheels, drive shafts) continues freewheeling in silence. Stand still until your eyes adjust and the battery-powered emergency exit lights illuminate the deck.
• Navigate Carefully: Walk with one hand on handrails and follow photoluminescent emergency escape strips along floor plates to the Engine Control Room (ECR) or the muster point.
• Assist the Duty Engineer: Under the engineer's instructions, verify the emergency switchboard is energized, check main starting air receiver pressure gauges ($30\text{ bar}$), drain moisture from air lines, and assist in manually priming and starting the standby auxiliary generator.

2. Machinery Space Catastrophic Flooding Emergencies

Machinery spaces are situated at the very bottom of the ship's hull, penetrated by large-diameter sea water cooling pipelines, sea chests, stern tube seals, and overboard discharges. If a high-volume sea water pipe ruptures or a sea chest fractures, thousands of tonnes of sea water can inundate the compartment within minutes.

                    EXAMPLE EMERGENCY BILGE SUCTION
  Machinery-space drainage level
                |
       Plain emergency suction inlet
                |
       Emergency suction valve and non-return protection
       Controls accessible above machinery-space platform
                |
                v
  Sea inlet ---> Approved high-capacity pump ---> Discharge overboard
  valve          (commonly main circulating pump)

  Engineer directs the approved valve line-up for emergency dewatering.
  Isolate/control the sea connection as required to prevent backflooding.

Causes of Machinery Space Flooding

1. Sea Water Pipe Fractures: High-pressure cooling sea water pipes ($300\text{--}600\text{ mm}$ diameter) suffering catastrophic rupture due to severe internal corrosion, galvanic action, or violent water hammer.
2. Sea Chest Strainer Failure: Structural collapse of main or auxiliary sea chest strainer housing or sheared sea inlet valve body.
3. Stern Tube Packing / Seal Failure: Rupture of aft stern tube seals, allowing hydrostatic sea water to flood the propeller shaft tunnel and engine room aft bilges.
4. Hull Breach / Grounding Damage: Hull plate tearing caused by collision, grounding, or underwater obstruction.

Immediate Action Protocol for Flooding

1. Sound the Alarm & Alert the Bridge: Immediately press the engine room internal alarm, dial the bridge officer of the watch (OOW), and inform the Chief Engineer of the location and severity of the ingress.
2. Isolate the Ingress: Identify the damaged system and safely close the sea inlet, overboard or other isolating valves needed to stop its supply. Follow the engineer’s instructions and avoid entering rising water near electrical equipment.
3. Use Approved Dewatering Pumps: Under the responsible engineer, align pumps that have suitable bilge connections and discharge arrangements. Do not assume every ballast pump is connected to the bilges. Keep the suction supplied, prevent backflooding and monitor the water level; emergency pollution exceptions do not authorize routine bypassing.
4. Monitor Soundings: Monitor affected bilges and relevant tank soundings from safe positions, report the rate of rise and check for spreading flooding. Keep an escape route available and withdraw when ordered or when access becomes unsafe.

The Emergency Bilge Suction (Emergency Bilge Injection Valve)

If ordinary bilge pumping cannot control serious flooding, the emergency bilge suction, often called emergency bilge injection, provides a high-capacity dewatering route. SOLAS II-1/35-1 and applicable flag/class rules govern the arrangement. Know its location and procedure before an emergency.

• Engineering Arrangement:
  • A dedicated large-diameter suction connects machinery-space drainage level to the approved main circulating pump, or a suitable independent alternative where that pump is unsuitable. Follow the actual ship's emergency bilge arrangement and valve line-up.
  • The available pumping rate depends on the installed pump, suction and discharge conditions. Check the ship’s capacity and procedure; no single capacity range applies to all emergency suctions.
• Extended Spindle Handwheel:
  • The valve handwheel is mounted high on an extended steel spindle situated well above floor plates (often on the middle grating platform). This ensures that even if floor plates are submerged under $1\text{ to }2\text{ meters}$ of water, the valve can still be reached and opened.
  • The handwheel is painted in bright warning colors (red or yellow) and fitted with a prominent brass nameplate reading: EMERGENCY BILGE SUCTION - USE ONLY IN EXTREME EMERGENCY.
• Operational Execution:
  • The responsible engineer orders the approved emergency-suction line-up, including the sea-inlet isolation or control required for that installation. Confirm discharge and avoid admitting sea water through the bilge suction.
  • The pump draws floodwater from the machinery-space drainage level and discharges it overboard. Monitor suction, discharge and water level. Pumping can help control the casualty, but success depends on reducing the ingress below the effective pumping rate.

3. Abandon Ship Protocol & Trainee Rating Duties

Abandoning ship is the final, ultimate measure when all firefighting, flood-control, and damage-mitigation efforts have failed and the vessel is in imminent danger of sinking or capsizing.

                      ABANDON SHIP PROCEDURAL WORKFLOW

  1. GENERAL EMERGENCY ALARM (GEA)
     (••••••• ────── : Seven or More Short Blasts Followed by One Prolonged Blast)
     Muster at Stations -> Headcount -> Prepare Survival Craft
                            |
                            v
  2. MASTER'S ORDER TO ABANDON SHIP
     Prearranged signal or word of mouth as stated in the muster list
     RECEIVE AND UNDERSTAND THE ORDER; GEA ALONE IS NOT ABANDONMENT.
                            |
                            v
  3. TRAINEE GP RATING DUTIES
     - Stop Assigned Machinery (if ordered by C/E) and Leave by a Safe Approved Escape Route
     - Don Warm Woolen Clothing, SOLAS Lifejacket & Immersion Suit
     - Muster at Assigned Lifeboat Station -> Assist with Launching Gear

General Emergency Alarm and the Master's Abandon-Ship Order

Trainee GP Rating Step-by-Step Duties

1. Machinery Securing & Engine Room Evacuation:
   • If on duty in the engine room when the GEA sounds, carry out emergency shutdowns as instructed by the Chief Engineer (trip quick-closing valves, isolate boiler fires, stop running machinery).
   • Leave by the nearest safe approved escape route. Where this uses a protected escape trunk, its fire enclosure, self-closing doors and emergency lighting protect the route from the lower machinery space to a safe position outside it. Know the alternative route in case one is blocked.
2. Personal Protective Preparation:
   • Follow the safe route and duties in the ship’s muster instructions. Collect prescribed clothing and life-saving equipment when safely available; do not return through smoke or flooding or delay escape to retrieve them.
   • Put on warm, heavy clothing (long woolen trousers, sweater, socks) to protect against cold shock and hypothermia.
   • Don your SOLAS-approved immersion suit and carry your SOLAS lifejacket (ensuring whistle, retro-reflective tape, and water-activated light are attached).
3. Muster Station & Survival Craft Duties:
   • Report directly to your assigned lifeboat or liferaft muster station on the boat deck.
   • Answer your name during roll call by the muster station commander (Third Mate or Second Engineer).
   • Carry out assigned physical tasks: remove lifeboat gripes, pull out harbor safety locking pins, unhook battery charging cables, lower embarkation ladders over the side, clear boat falls, and prepare painter lines.

4. Statutory Shipboard Safety Drills & Training Regimes

Under SOLAS Chapter III, Regulation 19 and Chapter V, Regulation 26, emergency preparedness on merchant ships is maintained through mandatory, recurring shipboard drills.

SOLAS Emergency Drill Participation and Content

Passenger ships also hold fire and abandon-ship drills weekly, with as many crew as practicable participating; each crew member still meets the monthly participation requirement. New-service, major-modification and new-crew situations require drills before sailing.

Trainee GP Rating Practical Drill Responsibilities

• Firefighting Tasks: Familiarize with all hydrant locations, nozzle settings (jet/spray), fire dampers, remote fuel stop pulls, and emergency escape routes. Practise efficient, correct donning of the complete fireman’s outfit and SCBA, checking fit, air supply and communications before use. Use the ship’s drill instructions and confirm that the wearer is ready before entry.
• Lifeboat & Liferaft Tasks: Operate boat fall wire tricing pendants, clear securing gripes, unplug the 24V trickle-charging line, pull safety pins, secure drain plugs, and rig the embarkation ladder over the ship's side.
• Enclosed Space Recovery: Rig extraction tripods squarely over manholes, test ventilation air blowers, inspect rescue stretchers (Neil Robertson stretcher), and verify baseline atmosphere testing protocols before entry.
• Emergency Steering Handover: Practice reading the rudder quadrant mechanical pointer directly, communicating rudder orders with the bridge over the fitted emergency communication link, and following emergency steering changeover checklists posted in the steering compartment.

Conducting Drills with Professional Discipline

• Drills must simulate realistic conditions. Artificial smoke generators, casualty mannequins, and simulated blackout environments are used to test readiness.
• Following every drill, the Master and Chief Engineer conduct a comprehensive debriefing session on the bridge or ship's office to analyze response times, identify communication breakdowns, inspect life-saving appliances, and log the drill in the official Ship's Log Book as required by maritime law.