Some of the ballast is arranged to be readily portable so that adjustments can be made to the vessel's trim to compensate for changes in weight and moment arising from modifications during refit .
Ezinye izinto ezinzima zokuzinzisa inqanawa zibekwa ngendlela yokuba zikwazi ukulungiseleleka ngokulula kumthwalo wenqanawa ukubonelela iinguquko zobunzima bawo ngexesha lokuwulungisa.