When a heavy lift is just lifted up from the deck the KG of the heavy lifted is directly transferred from the deck line to the top of the derrick head, when the KG raises the GM reduces and the list increases.
Tanø = GG1/GM
may also due to the large v/L passing close by , ship to ship interaction !also due to the uneven balasting .
while discharging,the centre of gravity of the ship moves away from the centre of gravity discharged load,due to this movement of cog
list occurs
