Calculation of assumed heeling moments and general assumptions due to a shift of cargo surface in ships carrying bulk grain.

 General assumptions

For the purpose of calculating the adverse heeling moment due to a shift of cargo surface in ships carrying bulk grain it shall be assumed that:

• In filled compartments which have been trimmed in accordance with grain code , a void exists under all boundary surfaces having an inclination to the horizontal less than 30° and that the void is parallel to the boundary surface having an average depth calculated according to the formula:

Vd= Vd1+0.75 (d-600) mm

Where:

Vd = average void depth in millimetres
Vd1 = standard void depth from table below
d = actual girder depth in millimetres.

In no case shall Vd be assumed to be less than 100 mm.