We can divide the chapter into two  parts: the first one consist of the description of Susan and Foe's dead body ; the second one is the evocation of an imaginary situation in which someone looks into a hulk in which he finds Susan's  and Friday's dead body

The second pat of the chapter is absolutely unreal.

We do not know who  the narrator of this chapter is.

Along the entire chapter, the narrator only shows the situation as lif it were a film shot and, as a consequence,  the reader can only wonder about what he is reading but he doesn't participate in the development of the story.

This is an absolutely new part in respect to the classical novel and, as a consequence you cannot  make a comparison with Defoe's novel or with the Theatre.

(I can't go on whit the analysis of the chapter because I can't understand what Coetzee wants to communicate to the reader.)