The water content of moist air can be measured with no less than six different metrics: Wet Bulb Temperature, Relative Humidity, Absolute Humidity, Degree of Saturation, Humidity Ratio (also known as Mixing Ratio), and Specific Humidity.
You can use a sextant to determine the position (called the âshootâ) in the sky of the sun, moon, or other celestial body, as well as your longitude. Although its design looks complicated, with an understanding of how it works and practice, you can reliably use it to find your position. Ad.
In the past, I believe the navigator on sailing ships (wooden ships, tall ships) had to use an instrument called a sextant that was pointed directly at the sun to find the ship's latitude or longitude, I'm not sure which, and after many times of looking into the sun the retina became cooked and the navigator lost his eye.