Answer
Joining a ship as Chief Engineer right before undocking is a high-stress scenario that carries immense technical and legal liability. You are effectively signing off on critical underwater modifications, surveys, and structural repairs that you did not personally supervise.
Your immediate priority is to verify hull integrity, ensure all disturbed underwater fittings are sealed, and prepare your machinery spaces for a safe refloating sequence.
Phase 1: Rapid Handover & Documentation
Time will be short, so your handover with the outgoing Chief Engineer (or the Second Engineer if the CE has already departed) must be highly focused:
Review the Drydock Specification File: Identify every single job involving an underwater penetration (sea valves overhauled, sea chests modified, tailshaft surveys, rudder clearances, and echo sounder/speed log renewals).
Verify Survey and Statutory Status: Ensure the Classification Society Surveyor has signed off on all structural repairs and pressure tests, ensuring compliance under the Indian Merchant Shipping (MS) Act, 2025 and Class rules.
Review the Tank Sounding Log: Compile a joint sounding report of all fuel oil, ballast, fresh water, and sludge tanks. The ship’s current weight distribution must match the Dock Master’s calculated stability plan to avoid a premature list, trim, or excessive hull stress upon floating.
Phase 2: The Physical External Inspection (The "Bottom Walk")
Before giving the Dock Master permission to flood the dock, you must conduct a physical inspection of the vessel's exterior hull alongside the Second Engineer:
Bottom Plugs: Physically verify that every single tank bottom drainage plug removed during the dock has been refitted, tightened, and cement-boxed or locked by the yard.
Sea Chest Grates: Ensure all sea chest grids are closed, secured, and that sacrificial zinc anodes are securely bolted and not painted over.
Transducers & Sensors: Confirm that protective covers on the echo sounder and speed log sensors have been removed.
Propulsion & Steering: Verify the propeller rope guard is welded back in place, the tailshaft seals aren't weeping oil, and the rudder drain plug is secured.
Temporary Blanks: Ensure all yard-fitted external blanks used for sea-valve pressure testing have been removed.
Phase 3: Internal Engine Room Preparation
Once you step back inside the engine room, execute these critical isolations and checks:
Close All Sea Valves: Ensure every single sea chest valve and overboard discharge valve is tightly closed before flooding starts.
Box Up Filter Covers: Double-check that all main and auxiliary sea chest strainers opened for cleaning have been correctly boxed up with fresh gaskets.
Secure the Floor Spaces: Ensure all heavy spare parts, tools, and gas cylinders used during the repair period are securely lashed down. The vessel may experience minor rocking or list when leaving the blocks.
Logbook Entry: Record in the Official Log Book (OLB) that all underwater checks have been completed and the engine room is ready for refloating.
Phase 4: The Flooding and Floating Sequence
The process of flooding the dock must be managed through structured milestones to contain any sudden leaks.
Stage 1: Flood to Sea Chest Level
Dock master initiates water entry
Allow the dock to flood slowly until the water level rises just above the main and auxiliary sea chests. Halt the flooding at this stage.
Stage 2: Vent and Inspect Submerged Lines: Critical leak checks
Station engineers at every sea chest and overhauled valve. Slowly open the sea valves to purge air through the top vent valves. Inspect the valve glands, pipeline flanges, and strainer covers for weeping, sweating, or active leakage.
Stage 3: Complete Flooding to Floating Draft: Vessel leaves the blocks
If the engine room remains completely dry, give the Dock Master clearance to resume flooding until the vessel achieves its floating draft. Continue monitoring all engine room wells, tank tops, and internal manhole covers that were opened during dock.
Phase 5: Power Restoral and Machinery Trials
Once the vessel is fully afloat and stable:
Switch from Shore Power: Coordinate with the yard to disconnect shore power. Start an auxiliary engine generator, verify parameters, and connect it to the main switchboard (restore the ship's dead-bus or synchronize).
Execute Steering Gear Trials: Start the steering gear hydraulic pumps, purge any air from the rams, and test full port-to-starboard movements alongside the deck department.
Turn the Main Engine: Engage the turning gear with the lube oil pumps running, and turn the Main Engine for at least one full revolution to ensure there is no mechanical fouling or resistance from the tailshaft/propeller assembly.