Minimum stability criteria

Grain ships

bullet The list due to grain shift must not be greater than 12 degrees.
bullet The residual area between HAC and RAC up to 40 degrees or angle of flooding, whichever is less, shall not be less than 0.075 m-r.
bullet The initial GM after correction for free surface effect must not be less than 0.30m.

 

In calculating suitable stability, following assumptions were made:

bullet When the deck head slopes at less than 30 degrees to the horizontal, a void is assumed the depth of which can be ascertained by formula.
bullet There is a void of average depth 15cm below the hatch cover.
bullet Grain is assumed to move in a prescribed pattern such that the voids change shape and the grain surface moves 15 degrees to the horizontal.