260. The difference between the initial trim of a vessel and the trim after a change in load has occurred is known as __________.

The difference between initial and final trim is termed 'change of trim'. This reflects the difference in draft between the bow and stern after a load change, a standard naval architecture concept. 'Change of draft' refers to draft variation, 'trim' is the current difference in draft, and 'final trim' is the trim after a change, none of which accurately describe the difference between initial and final trim conditions.