![]() Wrong assumptions and incorrect calculations can be entirely confusing. If a pilot tends to have the wrong height information, terrible consequences may await them. There is no accuracy in height between all techniques used because there are different assumptions being made. The altimeter is then set to the international standard atmosphere once the plane is above the transition altitude.īesides pilots, sailors, astronauts, and even solders use a variety of different techniques and equipment to calculate and measure heights. They are laid out in each box clearly for pilots to read. They can easily subtract the altimeter reading from the terrain altitude since the terrain altitude is a part of MSL.Īviation charts contain boxes in which are divided and consist of terrain altitude maximum from MSL. Pilots can also estimate height levels above the ground by doing some calculations. Editorial Team Old french aircraft altimeter Changes in sea level can affect the calculations of MSL. MSL’s values can be calculated in accordance with the land. MSL measurements also involve SWL when changes are relevant such as tides, etc. SWL or still water level are sea levels that consist of wind-wave calculations as well. Pilots can do this by choosing a certain location and measure the level of the sea at that certain point. A datum is the easiest way to calculate the MSL. The atmospheric pressure and temperature also play a role in the continuous motion of the sea and being able to measure its level. This is because the sea constantly moves depending on the tides and wind. For a period of about 19 years, the MSL has been continuously measured using the rise and fall of the ocean on the seacoasts. Sea level continuously changes on a variety of scales. ![]() It is really not easy to obtain an exact measurement of MSL because there are many factors that affect the level of the sea. ![]()
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