Answer:
Having the diver narrate the story
It gives the reader insight into how stressful a rescue mission can be, which helps the reader understand the narrator's feelings of doubt.
Step-by-step explanation:
When the narrator of a story is an active participant, the reader gains greater insight into the plot of the story. The reader is enabled to appreciate the skills displayed by the narrator with the narrator's inner thoughts fully exposed. The reader may take sides with the narrator or completely denounce the narrator's role in the unfolding events, especially the conflicts.