Drydocking Preparation and Procedure for Chief Engineers

Pre-Drydock Planning (3-6 months before)

1. Review classification society requirements and survey status
   • Identify due surveys and inspections
   • Note any outstanding conditions of class
2. Prepare comprehensive repair specification
   • Review previous drydock reports
   • Compile defect list from ship staff reports
   • Include planned maintenance items
   • Add statutory/class requirements
3. Coordinate with superintendent
   • Finalize repair specification
   • Discuss budget and timeline
   • Arrange for spare parts and specialist services
4. Prepare vessel
   • Plan tank cleaning and gas freeing (for tankers)
   • Arrange for riding crew if needed
   • Review stability and trim requirements

Mechanical and Structural Preparation

1. Hull and structure
   • Inspect hull, identify areas needing repair
   • Check for corrosion, cracks, deformation
   • Measure hull thickness if required
2. Propulsion system
   • Inspect propeller, shaft, stern tube
   • Check rudder clearances
   • Plan any overhauls of main engine, gearbox
3. Auxiliary machinery
   • Inspect sea valves, sea chests, anodes
   • Check condition of heat exchangers
   • Plan overhauls of pumps, compressors etc.

Documentation and Safety

1. Compile necessary documents
   • Classification certificates
   • Previous survey reports
   • Machinery history and manuals
2. Safety preparations
   • Review yard safety procedures
   • Brief crew on safety precautions
   • Check firefighting and lifesaving equipment
3. Environmental considerations
   • Plan for proper disposal of sludge, bilge water
   • Arrange for shore reception facilities if needed

Drydock Entry Procedure

1. Pre-arrival checks
   • Change over to MDO/MGO fuel
   • Secure all overboard discharges
   • Prepare for shore power connection
2. Docking process
   • Coordinate with pilot and dockmaster
   • Monitor vessel’s position on blocks
   • Connect shore services (power, water, etc.)
3. Initial inspections
   • Conduct underwater hull inspection
   • Check propeller, rudder, sea chests
   • Mark areas for repair/maintenance

During Drydock Period

1. Daily routines
   • Attend yard meetings
   • Supervise ongoing work
   • Liaise with class surveyors
2. Key responsibilities
   • Monitor work progress against schedule
   • Approve any additional work
   • Ensure quality control of repairs
3. Testing and trials
   • Oversee pressure tests of valves/pipes
   • Conduct sea trials if major work done
   • Verify all systems operational before undocking

Undocking and Post-Drydock

1. Final checks
   • Ensure all work completed satisfactorily
   • Obtain class and statutory certificates
   • Close out all repair items
2. Undocking procedure
   • Prepare vessel for refloating
   • Monitor vessel condition during undocking
   • Conduct alongside trials
3. Documentation
   • Complete drydock report
   • Update vessel’s maintenance records
   • Plan follow-up actions if needed