Extensive research carried out for the purpose of developing appropriate criteria for new vessels has clearly shown that in addition to the GM and freeboard being important parameters in the survivability of passenger ships, the area under the residual stability curve up to the angle of maximum GZ is also an other major factor.
Obsežna raziskava, izvršena za namen razvijanja ustreznih meril za nova plovila, je jasno pokazala, da poleg GM in nadvodja, ki sta pomembna parametra za možnost za nadaljnje obratovanje potniških ladij, obstaja še drug pomemben faktor, in sicer površina, ki se nahaja pod krivuljo preostale stabilnosti do kota največjega GZ.