What is the significance of Wonder Woman's invisible plane?

The invisible plane serves as a critical narrative device in the history of Wonder Woman, primarily functioning as the vehicle that enables her initial journey from the uncharted Paradise Island to "Man's World."1

By utilizing this craft, Princess Diana is able to transport the injured pilot Steve Trevor back to the United States, a pivotal moment that facilitates her entry into human society and the adoption of her secret identity as Diana Prince. While the character possesses formidable innate abilities—such as prodigious strength, speed, and near invulnerability—the invisible plane provided a necessary means of travel during her early adventures, allowing her to navigate the world while maintaining the secrecy essential to her dual life.1