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Sometime celestial navigation teacher James Austin provided us with this diagram he devised to help his students when he taught celestial navigation. Here’s his explanation: “I came up with this diagram to visually illustrate for students the goal of celestial navigation. It’s a way of showing the process of getting a bearing (‘azimuth’) and range (‘altitude’) of the celestial body’s GP from the ship, with the difference between Ho and Hc being the ‘intercept’ along the azimuth. It was devised as a pictorial pathway showing where each of the navigation volumes fit into the process. Most of my students liked the fact that they could look at this diagram to get re-oriented after being mired in numbers. It helped them to be reminded where they were along that path.”
