General Drydock Flashcards
Logbook, pre and post, repair list
Prep for drydock
- Make a repair and maintenance list, create or obtain a dry-dock handbook if required, and assign responsible ship staff to their duties on the list. Divide staff into groups to oversee the work carried out by yard gangs.
- All spare parts must be checked and repair items kept ready for use.
- Previous dry dock reports should be studied and previous clearance measures noted.
- Clean engine room tank top and bilges.
- Prepare sewage treatment tanks, dirty oil tanks and bilge tanks.
- Minimum bunkers (Fuel Oil and Fresh water) and ballast carried.
- All heavy weights secured prior to dry dock.
- All tanks and cofferdams must be sounded and recorded.
- Fire fighting plans and safety measures discussed before dry dock
- Fire fighting equipment on board should be checked and kept ready for use.
- Emergency lighting and generator should be tested before entry.
- Escape routes must be clearly marked.
- Shore connections for cooling water and fire line are to be readied.
- Main engine, generators, and boiler are changed over to diesel oil.
Before flooding
oSound round all tanks. The soundings to be same as the initial soundings when the ship landed overall.
oCalculate the stability. The stability must match with the initial stability condition when the ship landed overall.
oAll the plugs are in place and pressure tested.
oGrease removed from the transducer points.
oAnodes.
oShip side markings
oAnchors heaved up.
oPaint dried up.
oScaffoldings removed.
oPropeller and rudder are clear of any obstruction and cover
Enclosed Space Entry information
COSWP
Ch 4 emergency drills
Ch 15 entering dangerous spaces
SOLAS Ch 11 atmosphere testing
Equipment for Testing Atmosphere
Manufacturers operating instructions Kept in safe place Properly calibrated Serviced Calibration and service records maintained
What must atmosphere equipment test for
Oxygen Flammable vapours Carbon monoxide Hydrogen sulphide Toxic gases appropriate for ships trade
General precautions
- All enclosed space access doors, hatches, manholes
- Potential hazards have been identified, isolated and made safe
- Ventilated
- Atmosphere tested
- Illuminated
- Communication
- Sentry
- Rescue and resuscitation equipment
- PPE
- Permit to work
Atmosphere readings
21% oxygen
Not more than 1% of LFL
Not more than 50% of occupational exposure limit
Carried out with ventilation stopped
Examples of dangerous spaces
Cargo pump rooms Hold and cargo spaces Double bottoms Fuel tanks Sewage tanks Chain lockers Void spaces Battery lockers
