Our chatty narrator Marlow rambles a bit about life at sea and what it means to be a sailor. We'd all find this a bit more interesting if he were singing. Or maybe if he looked like this.
Alas, we have no idea what he looks like, so we'll have to settle for Marlow and Jim arguing for about Jim's motives and actions.
Understandably, Jim defends himself, but Marlow finds Jim's decisions shifty. But Jim won't give up. He explains his decision to stand trial and expresses his distant hope to somehow redeem himself in the future. We'll see, Jimmy, we'll see.