Author Topic: 50 Plus Reasons The Earth Is Not Flat (Read 341013 times)

happenby · « **Reply #260 on:** March 08, 2017, 11:38:10 PM »

Broadly speaking a sextant is an instrument that measures the angle between two objects that are visible. Primarily, it is used to measure the angle between a celestial body and the horizon, a process normally known as sighting the object or taking a sight. The angle measured and the time at which it was measured is then used to identify the location of the user on the grid map of the world. Thus sextants are basically navigational tools and have been successfully used by seaman and even other travelers over the years. The most common process of this is to sight the sun at noon to find the latitude of one’s location.

Measuring the angle between two objects that are visible, which is the purpose of a sextant, has nothing to do with curvature. Every measurement is based on lines, line of siight, mirriors, angles, parallel, and vertical. In fact, the mirrors must be maintained or the measurement will be off. Mirrors within reflect directly, and cannot reflect curve. Notice that identification of location is charted on GRID MAP. A grid map is flat. That they can translate these lines and angles to a globe is just another step. But its an unnecessary one, unless one wants you to believe you are on a globe.

Neil Obstat · « **Reply #261 on:** March 08, 2017, 11:52:03 PM »

Here is a well-known person explaining how to plot the position of your boat at sea, using a sextant together with The Air Almanac, which was published twice each year when the video was made (1984).

Especially noteworthy is minute 5:15 when Mr. Buckley says for the purposes of celestial navigation the earth is presumed motionless with the sun continually moving around it. His model shown at that point speaks for itself. It would make no sense whatsoever if the earth were "flat."

[youtube]https://www.youtube.com/embed/Xz0VazejX1Q[/youtube]

Neil Obstat · « **Reply #262 on:** March 08, 2017, 11:56:46 PM »

A nautical mile is equal to one minute of arc at the equator.

The arc is taken from the center of the earth to the surface.

At some point further north, for example, the 45th parallel, what measurement of arc describes one nautical mile, and, if it is different than one minute, why is that the case?

In the video above, at minute 20, the LHA (Local Hour Angle) calculation is based on the angle described by the difference between a line from the center of the earth to the sun and the line from the center of the earth to your boat. How could that be possible if the earth were not spherical?

ManuelChavez · « **Reply #263 on:** March 08, 2017, 11:59:33 PM »

Why do those who espouse a flat earth claim that water cannot cling to a "ball" earth because gravity would not allow for it, and then also say that gravity is a myth?

Neil Obstat · « **Reply #264 on:** March 09, 2017, 12:11:34 AM »

Quote from: happenby

Broadly speaking a sextant is an instrument that measures the angle between two objects that are visible. Primarily, it is used to measure the angle between a celestial body and the horizon, a process normally known as sighting the object or taking a sight. The angle measured and the time at which it was measured is then used to identify the location of the user on the grid map of the world. Thus sextants are basically navigational tools and have been successfully used by seaman and even other travelers over the years. The most common process of this is to sight the sun at noon to find the latitude of one’s location.

Measuring the angle between two objects that are visible, which is the purpose of a sextant, has nothing to do with curvature.

Source, please?
Let me guess: you're just making this up.

Quote

Every measurement is based on lines, line of siight, mirriors, angles, parallel, and vertical. In fact, the mirrors must be maintained or the measurement will be off. Mirrors within reflect directly, and cannot reflect curve. Notice that identification of location is charted on GRID MAP. A grid map is flat. That they can translate these lines and angles to a globe is just another step. But its an unnecessary one, unless one wants you to believe you are on a globe.

But if the earth were flat, the angle between the north star, Polaris, and the horizon, would always be the same, regardless of latitude.

Maybe your failure to grasp that fact is why you think that the earth is flat.