What was the first ship to circle the globe?
THE VICTORIA SHIP
Where are the Tropic of Cancer and Tropic of Capricorn and Arctic Circle and Antarctic Circle located on a globe?
Straight line chord that tunnels through the globe. The shortest arc on the surface of the globe - which you may have wanted to ask about but did not - is found by drawing a great circle. This is the circle whose centre is the centre of the globe and whose circumference passes through the two points.
They are very closely related. Any great circle route moves along the circumference of a great circle around the globe. If a route does not stay on the circumference of a great circle, it is not a great circle route. It is easy to see what great circles are on the earth, and you can easily demonstrate them if you have a globe handy*. First, imagine a sphere with no lines or markings on it…
Tarangini started its first circumnavigation of the globe in 2003-04 with the theme of "Building Bridges of Friendship across the oceans. During the fifteen-month voyage, the ship covered 33,000 nautical miles (61,000 km) and visited 36 ports in 18 countries. The ship was received by the president, Dr. A. P. J. Abdul Kalam.
In spherical geometry we look at the globe as the sphere S^2. Any plane intersecting the sphere will create a great circle. Now if you take any point on the globe and reflect it across that plane, you have another point that is equidistant from the plane. The sets of all these points will be equidistant from the great circle.