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.
1 Your sextant may not regard the horizon line as being 0 degrees. 2  If it doesnât, youâll have to correct the angle measure of the object youâre trying to determine by the same amount as the horizon line error. 3  This error is called index error.