Answer Construction Question 24
Question
24: Vessel has gone through very heavy weather. On arrival at safe
anchorage, you are conducting your inspection to determine damages to
hull.
A. List the areas you will inspect.
B. List your findings of any significance.
C. Write a report to company suggesting repairs if any.Answer: A. List of the areas to be inspect.
The forward end and the aft end of the ship is the most affected portion of the ship.
Hence the following locations are inspected after passing through significant heavy weather passage.
Fore End: -
Panting and pounding are the highly affecting phenomena in heavy weather hence the following spots are inspected to ascertain the damages.
Stiffening / Strengthening is provided in the form of frames, breast hooks, wash plates, deep radius floors, pillars, panting stringers, panting beams, variety of stringers and girders. Shell plating and all such stiffening member is closely inspected for any cracks or buckling.
Fore Peak Tank should be safely entered and inspected for any buckling, dents and possible cracks on the hull.
Chain Lockers to be closely inspected, often chain lockers are filled with water post heavy weather, the water should be pumped to bilge tanks and then then space to be entered safely for thorough inspection.
Other areas of inspection are;
1. Fracture and deformation of bow transverse web in way of cut-outs for side longitudinal
2. Fracture at toe of web frame bracket connection to stringer platform bracket
3. Fracture in side shell plating in way of chain locker
4. Deformation of forecastle deck 5. Deformation of side shell plating in way of forecastle space
6. Fracture in forecastle deck plating at bulwark
Aft End: -
Aft end doesn't emerge and slam as forward end however, the stress occurs due to propeller and the rudder. The following are checked in Aft end region;
1. Fractures in longitudinal bulkhead in way of rudder trunk.
2. Fractures at the connection of floors and girder/side brackets
3. Fractures in flat where rudder carrier is installed in steering gear room
4. Fractures in steering gear foundation brackets and deformed deck plate
5. Stern frame, rudder arrangement and propeller shaft support
6. Fracture in rudder stock
7. Fracture in side shell plating at the connection to propeller boss
8. Fracture in stern tube at the connection to stern frame
The forward end and the aft end of the ship is the most affected portion of the ship.
Hence the following locations are inspected after passing through significant heavy weather passage.
Fore End: -
Panting and pounding are the highly affecting phenomena in heavy weather hence the following spots are inspected to ascertain the damages.
Stiffening / Strengthening is provided in the form of frames, breast hooks, wash plates, deep radius floors, pillars, panting stringers, panting beams, variety of stringers and girders. Shell plating and all such stiffening member is closely inspected for any cracks or buckling.
Fore Peak Tank should be safely entered and inspected for any buckling, dents and possible cracks on the hull.
Chain Lockers to be closely inspected, often chain lockers are filled with water post heavy weather, the water should be pumped to bilge tanks and then then space to be entered safely for thorough inspection.
Other areas of inspection are;
1. Fracture and deformation of bow transverse web in way of cut-outs for side longitudinal
2. Fracture at toe of web frame bracket connection to stringer platform bracket
3. Fracture in side shell plating in way of chain locker
4. Deformation of forecastle deck 5. Deformation of side shell plating in way of forecastle space
6. Fracture in forecastle deck plating at bulwark
Aft End: -
Aft end doesn't emerge and slam as forward end however, the stress occurs due to propeller and the rudder. The following are checked in Aft end region;
1. Fractures in longitudinal bulkhead in way of rudder trunk.
2. Fractures at the connection of floors and girder/side brackets
3. Fractures in flat where rudder carrier is installed in steering gear room
4. Fractures in steering gear foundation brackets and deformed deck plate
5. Stern frame, rudder arrangement and propeller shaft support
6. Fracture in rudder stock
7. Fracture in side shell plating at the connection to propeller boss
8. Fracture in stern tube at the connection to stern frame
B. List your findings of any significance.
Damages found on Fore end:-
1. Fracture and deformation was observed of bow transverse web in way of cut-outs for side longitudinals.
2. Fracture at toe of web frame bracket connection to stringer platform bracket.
3. Fracture in side shell plating in way of chain locker
4. Buckling deformation of side shell plating in way of forecastle space.
Damages found on Aft end: -
1. Fractures in longitudinal bulkhead in way of rudder trunk.
2. Fractures at the connection of floors and girder/side brackets.
3. Fractures in flat where rudder carrier is installed in steering gear room.
4. Fractures in steering gear foundation brackets and deformed deck plate
Damages found on Fore end:-
1. Fracture and deformation was observed of bow transverse web in way of cut-outs for side longitudinals.
2. Fracture at toe of web frame bracket connection to stringer platform bracket.
3. Fracture in side shell plating in way of chain locker
4. Buckling deformation of side shell plating in way of forecastle space.
Damages found on Aft end: -
1. Fractures in longitudinal bulkhead in way of rudder trunk.
2. Fractures at the connection of floors and girder/side brackets.
3. Fractures in flat where rudder carrier is installed in steering gear room.
4. Fractures in steering gear foundation brackets and deformed deck plate
C. Write a report to company suggesting repairs if any.
Dear superintend engineer,
As per our telephonic conversation today, please find attached report on the damages that was caused due to heavy weather on vessel's route from port XXX to port XXXX which requires immediate attention.
The vessel was thoroughly inspected and found out that there were about to severe damage which requires immediate attention.
1. Fracture at toe of web frame bracket connection to stringer platform bracket. Adequate soft nose bracket endings with a face plate taper of at least 1 : 3 to be provided.
2. Fractures in longitudinal bulkhead in way of rudder trunk. The fractured plating should be cropped and renewed. Natural frequency of the plate between stiffeners should be changed, e.g. reinforcement by additional stiffeners.
In view of the above repairs we have created list of spares and materials required and also worked out a work flow including costing. Please refer to our requisition number 1234 and kindly review and approve the same.
Thank you
Yours sincerely
2nd Engineer
MV Ship Name.
Dear superintend engineer,
As per our telephonic conversation today, please find attached report on the damages that was caused due to heavy weather on vessel's route from port XXX to port XXXX which requires immediate attention.
The vessel was thoroughly inspected and found out that there were about to severe damage which requires immediate attention.
1. Fracture at toe of web frame bracket connection to stringer platform bracket. Adequate soft nose bracket endings with a face plate taper of at least 1 : 3 to be provided.
2. Fractures in longitudinal bulkhead in way of rudder trunk. The fractured plating should be cropped and renewed. Natural frequency of the plate between stiffeners should be changed, e.g. reinforcement by additional stiffeners.
In view of the above repairs we have created list of spares and materials required and also worked out a work flow including costing. Please refer to our requisition number 1234 and kindly review and approve the same.
Thank you
Yours sincerely
2nd Engineer
MV Ship Name.
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