How does Victor dispose of the remains of his second creation in Frankenstein? Be specific.Who does Victor think about as he is on the ocean?

Concerning Shelley's Frankenstein,
Victor puts the remains of the female into a basket and drops it into the sea from his
boat, during the night under the cover of clouds. 

As far
as who Victor thinks about when he is on the sea, your question is a bit vague, since
he's on the sea more than once.  I'll assume your asking about when he is on the sea for
an extended time, narrating his tale to Walton.  In short, he thinks about everyone
involved, since he's narrating the story.  But, specifically, other than when he's
narrating, he is probably consumed with getting revenge upon the monster.  Thus, I
suggest he's thinking about the monster, and destroying him.