Stability and hull strength check item for cargo ship
The conditions of stability, hull strength, draft and trim of the vessel at sea and on arrival / departure at / from port and during loading / unloading cargo, bunkering and water ballast exchange, should be worked out, ensuring safety of the vessel. Safety of the cargo vessel depends on proper GM, stress calculation and other factors as being within appropriate Limits.
Following are the check item confirming stability and hull strength of cargo ship:
1. Is the GM value within limits specified in the loading manual and in compliance with IMO rules upto arrival next port?
2. Are GZ curves of the vessel fully understood, and their characteristics confirmed?
3. Have expected weather and sea conditions, been taken into consideration when confirming stability & hull strength?
4. Have free surface effects and any sloshing effects for the planned passage, been taken into consideration?
5. Are other items mentioned in the loading manual taken into consideration?
6. Are values of bending moment, shearing force and torsional stress at sea within acceptable limits upto arrival next port?
7. If applicable, has the “Auto” mode for heeling pump been changed over to “Manual” mode prior sailing?
8. Is the draft within applicable loadline or port/passage limits/restrictions?
9. Is stack weight / cargo density in accordance with maximum permissible values and have precautions as per the loading manual been followed?
10. Has forward draft limit (per loading manual) to prevent slamming been confirmed?
11. Is a proper propeller immersion ratio assured?
12. Have trim and draft changes during voyage in fresh or brackish water such as rivers, canals and lakes, been taken into consideration?
13. Is squat due to shallow water effect taken into consideration?
14. Is proper under keel clearance assured as per company policy
15. Are fuel oil and fresh water consumptions taken into consideration?
16. Have air draft limitations due to bridges, cargo handling equipment or other obstructions been assessed as necessary?
17. Is the navigation bridge visibility restriction in compliance with requirements of SOLAS chapter V and other applicable requirements (Panama Canal, Suez Canal etc)?
18. On tankers, is the Marpol (Reg 18) minimum criteria for draught and trim complied with? And has the departure condition been forwarded to office for use in case of emergency?
NOTE: Attach loadicator stability & hull strength summary
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