What are the three vertices of the navigational triangle?

The three vertices of the navigational triangle are indeed the Associated Point (AP), Geometric Positioning (GP), and the Pole. This triangle is fundamental in celestial navigation, helping navigators determine a vessel's position using celestial bodies.

The AP refers to a predetermined position point on the chart that corresponds to the celestial body's location. The GP represents the position on Earth directly below the celestial body, while the Pole typically refers to the celestial pole, which is a crucial reference point for navigation. Together, these elements create a graphical representation of the navigational relationship between a ship, its celestial context, and the Earth. Understanding these points allows mariners to effectively calculate their position and navigate more accurately across vast bodies of water.