Sentence:  Even though in a way you let him freeze to death in the water, because the way I see it.../ I agree. Y'know, I think he actually could have fitted on that bit of door./ There was plenty of room on the <WSD>raft</WSD>./ I know. I know, I know. 
Meaning of the word marked with <WSD> tags:  Any flattish thing, usually wooden, used in a similar fashion.