Dry Docking Inspection Checklist
Standard items to be checked at drydock:
- Hull cleaning
- Bottom plug
- Bottom survey
- Propeller shaft
- Anchor and anchor cable
- Chain locker
- Tanks and cargo holds
- Zinc anode
Repair items to be listed before arriving at drydock:
- Hull damage
- Heavy weather damage
- Bulwark and railing
- Duct line
- Cargo gear
- Hatch closing arrangement
- Control equipment
Modification items for drydock:
- LSA arrangement
- FFA arrangement
- Inert gas system
- Fire detection system
- New piping and structural arrangement
Pressure testing items for drydock:
- All portable fire extinguisher
- All SCBA cylinders
- CO2 cylinder
- O2 cylinder
- Lifeboat food rations/water
- Lifeboat pyrotechnics
- Lifeboat first aid kit
- Bridge pyrotechnics
- GMDSS battery
Survey items to be carried out at drydock:
- Ship safety equipment survey
- Ship safety radio survey
- Ship safety construction survey
Things to Check at Drydock
GENERAL INSPECTION BY CLASSIFICATION SOCIETY
Yard attending manager, superintendent, Master, C/E, C/O, and 2/E will carry out this general inspection.
This Inspection to be carried out during daylight hours.
Check: Deep dents, dented shell plating, damages to stiffeners, shell plating that have wasted badly.
Check the areas that requires grit blasting (Top side, boot side, bottom).
Coating thickness to be checked using a paint thickness gauge.
Both anchor cables are lowered and ranged into the drydock bottom and to be calibrated.
Both anchor chains to be turn end to end at each dry docking.
Check the diameters of the links.
Chain locker to be cleaned of mud and water and to be painted.
REPAIR THE HAWSE PIPE STEEL COLLARS
Ensure the transducer plates are cleaned.
Check water tight terminal box.
SPEED LOG or DOPPLER SPEED LOG
Speed log to be serviced and calibrated.
SACRIFICIAL ZINC ANODES
All zinc anodes are to be checked and renewed.
Ensure sufficient anodes on the bilge keels, the stern part and on the rudder.
In case of impressed current system, it should be calibrated.
Check sea chest of high sea suction, low sea suction and emergency fire pump sea suction.
Internal surface to be scraped and cleaned of marine growth.
Zinc anodes on the sea chests are to be checked.
SEA SUCTION VALVES AND DISCHARGE VALVES
To be overhauled.
Main intermediate valves and attached mud filters to be overhauled.
SANITARY STORM VALVES OVERHAUL.
DAMAGED BILGE KEELS TO BE RENEWED.
Check rudder bottom plug for any ingress of water.
Repair rudder plating that is cracked.
Check rudder top plug for tightness.
Check pintle bush clearance (top and bottom pintles). If clearances too much, then bushes are need to be renewed.