- Heavy lift operations using ship’s lifting gear
An instantaneous loss of GM will take place immediately that a weight is lifted either off the deck or from a position over the side. Such large increases in KG must be considered prior to any heavy lift operations and calculations should be conducted prior to any such operation to ensure that:
- The ship has adequate stability at all stages during the lift, and;
- Maximum list is restricted to an acceptable limit.
- Shift of bulk cargo
The vertical component of a shift of solid bulk cargo may be sufficient to reduce GM sufficiently to cause a loll situation, particularly if accompanied by one of the above. The larger horizontal component will also create listing moments compounding the situation further.
