Final answer:
Arthur Gordon Pym's acquisition of a sailboat in Edgar Allan Poe's narrative is pivotal as it enables the initiation of his sea voyage, illustrating his desire for exploration and symbolizing his independence.
Step-by-step explanation:
In the narrative of The Narrative of Arthur Gordon Pym of Nantucket by Edgar Allan Poe, the detail that Arthur Gordon Pym becomes the owner of a sailboat is significant because it sets the stage for the main adventure. Ownership of the sailboat allows Pym to embark on a journey that is central to the plot of the story.
This detail is crucial in establishing Pym's autonomy and agency, leading to various adventures and mishaps at sea. Pym's possession of a sailboat also symbolizes his craving for exploration and adventure, unusual for a person of his young age, which is further highlighted by the contrasting norms of the society around him.